Urinary tract infections (UTIs) are a common health issue that affects millions of people worldwide. They occur when bacteria enter the urinary system, which is responsible for producing and excreting urine. UTIs can affect any part of the urinary tract, including the bladder, urethra, and kidneys. It is important to understand the causes of UTIs in order to prevent and properly treat these infections.
One of the most common causes of UTIs is the spread of bacteria from the gastrointestinal tract to the urethra and bladder. This can happen when bacteria from the anus and rectum enter the urethra, which is the tube that carries urine from the bladder out of the body. Once bacteria enter the bladder, they can multiply and cause an infection. In some cases, the infection can travel up to the kidneys, leading to more severe symptoms and complications.
Women are more prone to UTIs than men, due to the shorter length of the female urethra. This shorter distance makes it easier for bacteria to reach the bladder. Additionally, changes in hormonal levels during pregnancy can increase the risk of UTIs. Other factors that can contribute to the development of UTIs include sexual activity, the use of certain types of birth control, and the presence of urinary catheters.
Common symptoms of UTIs include frequent urination, a burning sensation during urination, cloudy or strong-smelling urine, and pelvic pain. It is important to seek medical attention if you experience these symptoms, as untreated UTIs can lead to more serious complications. Treatment for UTIs usually involves a course of antibiotics to eliminate the bacteria causing the infection. It is also important to drink plenty of fluids and urinate frequently to help flush out bacteria from the urinary tract.
Causes of Urinary Tract Infections
A urinary tract infection (UTI) occurs when bacteria enters the urinary tract and causes infection. The most common type of UTI is a bladder infection, which can cause pain and burning during urination. Other symptoms of a UTI may include frequent urination, strong urge to urinate even when little urine is produced, cloudy or bloody urine, and discomfort or pressure in the lower abdomen.
Bacterial Infection in the Urinary Tract
A bacterial infection in the urinary tract occurs when bacteria enter the urinary system through the urethra and multiply in the urine. This can lead to a condition called urinary tract infection (UTI), which is more common in women than in men.
Common symptoms of a bacterial urinary tract infection include frequent urination, a strong urge to urinate, pain or burning sensation during urination, cloudy or bloody urine, and discomfort in the lower abdomen or back. It is important to seek medical attention if you experience any of these symptoms, as untreated UTIs can lead to more serious complications.
Bacteria are the main cause of urinary tract infections. The most common bacteria responsible for UTIs is Escherichia coli (E. coli), which normally resides in the gastrointestinal tract but can enter the urinary system through improper wiping, sexual intercourse, or other means. Other bacteria, such as Klebsiella, Proteus, and Staphylococcus, can also cause UTIs.
In order to prevent bacterial infections in the urinary tract, it is important to maintain good hygiene, especially around the genital area. This includes wiping from front to back after urination or bowel movements, drinking plenty of water to flush out bacteria, and urinating before and after sexual intercourse. It is also important to avoid holding in urine for long periods of time and to wear breathable underwear.
In conclusion, understanding the causes of bacterial infections in the urinary tract is crucial in preventing and treating urinary tract infections. By taking proper precautions and seeking medical attention when necessary, individuals can significantly reduce their risk of developing UTIs and maintain good urinary system health.
Risk Factors for Urinary Tract Infections
Urinary tract infections (UTIs) are caused by bacteria entering the urinary tract, leading to infection. While anyone can develop a UTI, certain factors can increase the risk of experiencing this uncomfortable and often painful condition.
Burning and Frequent Urination
One of the most common symptoms of a UTI is a burning sensation while urinating. This occurs when the bacteria in the urinary tract irritate the lining of the bladder or urethra. In addition to the burning sensation, individuals with a UTI may also experience a frequent urge to urinate.
Poor Hygiene
Improper hygiene practices can also contribute to the risk of developing a UTI. Not properly wiping after using the toilet, wearing dirty or tight underwear, and using unsanitary feminine hygiene products can all introduce bacteria into the urinary tract and increase the likelihood of infection.
Additionally, sexual activity can also introduce bacteria into the urinary tract, especially if proper hygiene is not maintained before and after intercourse.
Urinary Tract Abnormalities
Individuals with structural or functional abnormalities in the urinary tract are also at an increased risk of developing UTIs. Conditions such as kidney stones, urinary tract obstructions, or abnormalities in the urinary tract’s shape can create an environment that makes it easier for bacteria to grow and cause infection.
Other risk factors for UTIs include a weakened immune system, certain medical conditions such as diabetes, the use of urinary catheters, and menopause in women.
Understanding these risk factors can help individuals take preventive measures and seek timely treatment if they experience symptoms of a UTI. It is important to consult with a healthcare professional for a proper diagnosis and appropriate treatment.
Female Anatomy and Urinary Tract Infections
The female urinary system is comprised of the kidneys, ureters, bladder, and urethra. It plays a crucial role in eliminating waste from the body in the form of urine. However, due to its proximity to the anus, women are more prone to urinary tract infections (UTIs) compared to men.
Bacteria, most commonly E. coli, are the culprits behind most UTIs. These bacteria can enter the urinary tract through the urethra and make their way up to the bladder. The urethra in women is relatively shorter than in men, which makes it easier for bacteria to reach the bladder and cause infection.
Once in the bladder, these bacteria can multiply and cause inflammation, leading to the characteristic symptoms of a UTI. These symptoms can include a burning sensation during urination, frequent urination, cloudy or strong-smelling urine, and pelvic pain.
Understanding the female anatomy and its relationship to UTIs is essential in preventing and managing these infections. Maintaining good hygiene, urinating before and after sexual activity, and drinking plenty of water are some measures that can help reduce the risk of UTIs in women.
If a UTI occurs, prompt treatment with antibiotics is necessary to clear the infection and alleviate symptoms. Ignoring a UTI or delaying treatment can lead to more severe complications, such as a kidney infection.
Overall, being aware of the unique female anatomy and the factors that contribute to urinary tract infections can empower women to take proactive steps in preventing and managing these common infections.
Hormonal Changes and Urinary Tract Infections
Urinary tract infections (UTIs) are commonly caused by bacteria that enter the urinary tract through the urethra. However, hormonal changes in the body can also affect the risk of developing a UTI.
During certain times in a woman’s menstrual cycle, hormonal changes can alter the acidity of the urine, making it more susceptible to bacterial growth. This can increase the likelihood of developing a UTI.
Additionally, hormonal changes can affect the function of the bladder and urinary tract. The muscles in the bladder may become weaker, leading to difficulties in fully emptying the bladder. This can create an environment that is favorable for bacterial growth and increase the risk of developing a UTI.
Women experiencing hormonal changes, such as those during pregnancy or menopause, may be more prone to developing UTIs. It is important to be aware of the symptoms of a UTI, such as frequent urination, pain or burning during urination, and cloudy or strong-smelling urine. Prompt treatment with antibiotics can help alleviate symptoms and prevent the infection from spreading to the kidneys.
Overall, understanding the relationship between hormonal changes and UTIs can help individuals take necessary precautions to reduce their risk of developing these infections. Maintaining good hygiene and staying hydrated can also contribute to preventing UTIs.
Sexual Activity and Urinary Tract Infections
Bacteria are the main cause of urinary tract infections (UTIs), and sexual activity can contribute to the development of these infections. When engaging in sexual activity, bacteria from the genital area can be introduced into the urinary tract, leading to an infection.
During sexual activity, friction and pressure can cause microtears in the urethra, which is the tube that carries urine from the bladder to the outside of the body. These microtears can provide an entry point for bacteria, allowing them to travel up the urethra and into the bladder, where they can multiply and cause an infection.
Common symptoms of a UTI include a burning sensation during urination, frequent urination, and pain or discomfort in the lower abdomen. If left untreated, a UTI can potentially spread to the kidneys and cause more serious health issues.
To reduce the risk of developing a UTI from sexual activity, it is important to maintain good hygiene, including washing the genital area before and after sexual activity. It is also recommended to urinate before and after sexual activity to help flush out any bacteria that may have entered the urethra.
In addition, using barrier methods such as condoms can provide a layer of protection and help prevent the spread of bacteria during sexual activity. It is important to note that while these measures can help reduce the risk of UTIs, they are not foolproof and it is still possible to develop an infection.
If you experience symptoms of a UTI after sexual activity, it is recommended to seek medical attention. A healthcare provider can diagnose and treat the infection with antibiotics to help alleviate symptoms and prevent complications.
Catheter Use and Urinary Tract Infections
Urinary tract infections (UTIs) are a frequent occurrence in individuals who use catheters. A catheter is a medical device that is inserted into the bladder to drain urine. While catheters can be beneficial for patients who are unable to urinate on their own, they also increase the risk of UTIs.
Symptoms of Catheter-Associated UTIs
Individuals who use catheters may experience symptoms such as burning sensation during urination, cloudy or foul-smelling urine, and increased frequency of urination. These symptoms may indicate the presence of a UTI.
Bacterial Growth and Infection
When a catheter is in place, bacteria from the external environment can enter the urinary tract through the catheter tube. Additionally, bacteria can multiply within the catheter and create a biofilm, which serves as a protective layer. This biofilm makes it difficult for antibiotics to eliminate the bacteria, leading to a persistent infection.
The presence of bacteria in the urine can cause irritation and inflammation in the bladder, further contributing to the development of UTIs. Without proper hygiene and regular cleaning of the catheter, the risk of infection increases.
It is important for healthcare providers to closely monitor patients who use catheters and promptly address any signs of infection. Measures such as using sterile techniques during catheter insertion, practicing good perineal hygiene, and regularly changing catheters can help reduce the risk of UTIs.
To summarize, catheter use increases the risk of urinary tract infections due to the introduction of bacteria into the urinary tract and the formation of biofilms. Proper care and hygiene are essential in mitigating the risk of catheter-associated UTIs.
Urinary Tract Abnormalities and Infections
Urinary tract abnormalities can increase the risk of developing urinary tract infections (UTIs). The urinary tract is made up of the kidneys, ureters, bladder, and urethra, and any abnormalities in this system can disrupt the normal flow of urine and create an environment conducive to bacterial growth.
One common abnormality is a structural defect, such as a blockage or narrowing in the ureters or urethra. This can prevent the complete emptying of the bladder, allowing bacteria to multiply and cause infection. Additionally, abnormalities in the shape or size of the bladder can create pockets where bacteria can accumulate and thrive.
When urine flow is obstructed or incomplete, bacteria present in the urinary tract can be trapped and multiply, leading to infection. The stagnant urine provides a favorable environment for bacterial growth. The presence of bacteria in the urinary tract can cause symptoms such as frequent urination, pain or burning during urination, and a strong urge to urinate.
In some cases, urinary tract abnormalities can be congenital, meaning they are present at birth. In other cases, they can develop later in life due to injury, surgery, or other medical conditions. It is important to identify and treat these abnormalities to prevent recurrent UTIs and potential complications.
If you experience symptoms of a urinary tract infection, it is important to seek medical attention. A healthcare professional can diagnose the infection through urine tests and prescribe appropriate antibiotics to clear the bacteria. Additionally, they may recommend further evaluation to identify any underlying urinary tract abnormalities that may be contributing to the infection.
Diabetes and Urinary Tract Infections
Diabetes can increase the risk of frequent urinary tract infections. When blood sugar levels are not well controlled, it weakens the immune system, making it more difficult for the body to fight off bacteria that can cause urinary tract infections. Additionally, high levels of sugar in the urine can promote the growth of bacteria.
People with diabetes may experience similar symptoms of urinary tract infections as those without diabetes, including a frequent urge to urinate, painful urination, and a feeling of pressure or pain in the bladder area. In some cases, people with diabetes may not experience typical symptoms, making it important to be aware of any changes in urinary patterns or discomfort.
It’s important for individuals with diabetes to be aware of the increased risk of urinary tract infections and to take proactive steps to prevent them. This can include monitoring blood sugar levels, practicing good hygiene, staying hydrated, and seeking prompt medical treatment if an infection occurs. Additionally, managing diabetes through lifestyle changes and medication can help reduce the risk of developing urinary tract infections.
If you have diabetes and are experiencing burning or discomfort during urination, it’s important to consult with your healthcare provider to determine the cause and receive appropriate treatment. Ignoring symptoms or delaying treatment can lead to more serious complications, so early intervention is key in maintaining urinary tract health for individuals with diabetes.
Immune System Weakness and Urinary Tract Infections
Urinary tract infections (UTIs) occur when bacteria enter the urinary tract and multiply, leading to infection. While various factors can contribute to the development of UTIs, one important factor is the health of the immune system.
The immune system plays a crucial role in protecting the body from harmful invaders, such as bacteria. However, if the immune system is weakened or compromised, it may not be able to effectively defend against bacteria that enter the urinary tract.
In individuals with a weakened immune system, bacteria can multiply and cause infections more easily. As a result, the symptoms of a UTI, such as frequent urination, a burning sensation during urination, and pain in the lower abdomen or back, may be more severe and persistent.
Additionally, a weakened immune system can lead to recurring UTIs. Without a strong immune response, bacteria may not be fully eliminated from the urinary tract, allowing them to multiply and cause new infections.
It is important for individuals with a weakened immune system to take extra precautions to prevent UTIs. This can include practicing good hygiene, drinking plenty of water, and avoiding irritants that may irritate the bladder.
If you have a weakened immune system and experience symptoms of a UTI, it is important to seek medical attention. Your healthcare provider can provide a proper diagnosis and prescribe appropriate treatment, such as antibiotics, to help fight the infection.
In conclusion, immune system weakness can increase the risk of urinary tract infections. Maintaining a healthy immune system through proper lifestyle choices and seeking medical attention when needed can help prevent and treat UTIs effectively.
Kidney or Bladder Stones and Urinary Tract Infections
Kidney or bladder stones can be a contributing factor to the development of urinary tract infections (UTIs). When these stones form in the urinary system, they create an environment that is conducive to bacterial growth. Bacteria can adhere to the surface of the stones, allowing them to multiply and cause infection.
One of the main symptoms of a UTI is a burning sensation during urination. When bacteria are present in the urine, they can irritate the sensitive lining of the urinary tract, leading to discomfort and pain. Frequent and urgent urination are also common symptoms that can be experienced when an infection occurs in the bladder.
Symptoms of Kidney or Bladder Stones
In addition to the symptoms of a UTI, kidney or bladder stones may cause their own set of symptoms. These can include severe abdominal pain, blood in the urine, and changes in urine color or smell. Depending on the size and location of the stones, the pain can be debilitating and may require medical intervention.
Treatment and Prevention
To treat a UTI that is caused or worsened by kidney or bladder stones, a healthcare provider may prescribe antibiotics to eliminate the bacterial infection. Pain medication may also be recommended to alleviate discomfort. In some cases, surgical intervention may be necessary to remove the stones.
Preventing the formation of kidney or bladder stones can help reduce the risk of developing a UTI. Drinking plenty of water, maintaining a healthy diet, and avoiding excess salt and animal protein can all contribute to kidney health and reduce the likelihood of stone formation.
Urinary Tract Infections in Pregnancy
Pregnancy can increase the risk of developing a urinary tract infection (UTI) due to the changes that occur in the urinary system. UTIs occur when bacteria enter the urinary tract and multiply, causing an infection.
Symptoms
Urinary tract infections in pregnancy can present with various symptoms, including:
- Burning sensation during urination
- Frequent need to urinate, but only passing small amounts of urine
- Pain or pressure in the lower abdomen or back
- Cloudy, bloody, or strong-smelling urine
- Fever or chills (indicating a possible kidney infection)
Infection and the Bladder
UTIs during pregnancy usually start in the bladder, which is the part of the urinary system that stores urine. The bacteria enter the bladder through the urethra, the tube that carries urine from the bladder to the outside of the body. The hormonal changes during pregnancy can cause the muscles of the bladder to relax, reducing its ability to empty completely. This can lead to the growth of bacteria and increase the risk of infection.
As the bladder is infected, it can become inflamed and irritated, causing the symptoms of a UTI. If left untreated, the infection can spread to the kidneys, which can result in a more severe condition known as pyelonephritis.
It is important for pregnant women to seek medical attention if they suspect a urinary tract infection. UTIs during pregnancy can increase the risk of complications, such as preterm labor, low birth weight, and kidney infection.
Treatment for UTIs during pregnancy usually involves antibiotics that are safe to use during pregnancy. It is essential to take the full course of antibiotics as prescribed by a healthcare provider to ensure the infection is completely cleared.
To reduce the risk of UTIs during pregnancy, it is recommended to drink plenty of water, urinate regularly, practice good hygiene, and avoid irritating feminine products or harsh soaps.
Menopause and Urinary Tract Infections
Menopause is a natural condition that occurs in women as they age, resulting in a decrease in estrogen levels. This hormonal change can lead to a variety of symptoms, including burning and pain during urination.
The Connection between Menopause and UTIs
Urinary tract infections (UTIs) are caused by bacteria entering the urinary system and causing an infection. During menopause, the decrease in estrogen can lead to a thinning of the tissues in the urinary tract, making it more susceptible to bacterial infections.
One of the most common symptoms of a UTI is a frequent and urgent need to urinate, even when only small amounts of urine are produced. This can be particularly bothersome for women going through menopause, as it can disrupt daily activities and sleep patterns.
Managing UTIs during Menopause
If you are experiencing symptoms of a UTI during menopause, it’s important to seek medical treatment. Your healthcare provider can prescribe antibiotics to clear the infection and provide relief from symptoms. Additionally, they may recommend lifestyle changes, such as staying hydrated and practicing good hygiene habits, to help prevent future UTIs.
Overall, understanding the connection between menopause and urinary tract infections can help women better manage their symptoms and take steps to reduce their risk of developing a UTI. By staying informed and seeking medical care when needed, women can continue to enjoy a healthy and active lifestyle during this transitional phase of life.
Antibiotic Resistance and Urinary Tract Infections
Frequent and painful urinary tract infections (UTIs) are a common occurrence, often caused by bacteria entering the bladder. These infections can lead to a variety of uncomfortable symptoms, such as a burning sensation during urination, increased frequency of urination, and lower abdominal pain.
Traditionally, antibiotics have been the go-to treatment for UTIs, effectively eliminating the bacteria causing the infection. However, over time, the misuse and overuse of antibiotics have led to the development of antibiotic resistance in bacteria. This means that the bacteria are no longer susceptible to the effects of the antibiotics, making them much more difficult to treat.
Antibiotic resistance in UTIs poses a significant challenge for both patients and healthcare providers. It can lead to longer and more severe infections, as well as an increased risk of complications. In some cases, alternative antibiotics may need to be used, which can be more expensive or have more significant side effects.
To combat antibiotic resistance in UTIs, it is crucial to use antibiotics judiciously and appropriately. This includes ensuring that antibiotics are only prescribed when necessary, following the prescribed treatment regimen, and not sharing antibiotics with others. Additionally, promoting good hygiene practices, such as proper handwashing and urinary tract hygiene, can help prevent the spread of bacteria and reduce the risk of infection.
In conclusion, antibiotic resistance is a growing concern in the management of urinary tract infections. By understanding the causes and consequences of antibiotic resistance, as well as implementing appropriate prevention and treatment strategies, we can work towards reducing the impact of antibiotic resistance on UTIs and improving patient outcomes.
Personal Hygiene and Urinary Tract Infections
Personal hygiene plays a crucial role in preventing urinary tract infections (UTIs). UTIs occur when bacteria enter the urinary tract through the urethra and multiply in the bladder. One of the main factors that can contribute to the development of UTIs is poor personal hygiene practices.
Importance of Good Hygiene
To prevent UTIs, it is important to maintain good hygiene practices, especially in the genital area. This includes washing the area around the urethra and genitals regularly with mild soap and warm water. Proper cleaning helps to remove any bacteria that may be present and reduces the risk of infection.
Additionally, it is essential to wipe from front to back after using the toilet. This prevents the transfer of bacteria from the anal area to the urethra, which can lead to a UTI. By following these simple hygiene practices, individuals can significantly reduce the risk of developing a urinary tract infection.
Common Symptoms and Prevention
A UTI can cause various symptoms, such as a frequent urge to urinate, burning sensation during urination, and pain in the lower abdomen. These symptoms can be uncomfortable and disruptive to daily life. However, by practicing good personal hygiene, individuals can lower their chances of experiencing such symptoms.
Other preventive measures include staying hydrated, urinating before and after sexual intercourse, and wearing breathable underwear. It is also essential to avoid using strong chemical irritants, such as douches or scented feminine products, as these can disrupt the natural balance of bacteria in the urinary tract and increase the risk of infection.
Conclusion
In conclusion, personal hygiene plays a crucial role in preventing urinary tract infections. By maintaining good hygiene practices, individuals can reduce the risk of bacterial entry into the urinary tract and minimize the chances of developing UTI symptoms such as frequent urination, burning sensation, and abdominal pain. Practicing good personal hygiene, along with other preventive measures, can help individuals maintain a healthy urinary tract.
Contraceptive Methods and Urinary Tract Infections
Urinary tract infections (UTIs) are a common occurrence among women, with approximately 50-60% of women experiencing at least one UTI in their lifetime. While there are several factors that contribute to the development of UTIs, one important aspect that is often overlooked is the use of contraceptive methods.
Types of Contraceptive Methods
Contraceptive methods are used by women to prevent unwanted pregnancies. There are different types of contraceptive methods available, including hormonal methods such as birth control pills, patches, and injections, as well as non-hormonal methods such as condoms, diaphragms, and intrauterine devices (IUDs).
Impact on UTIs
Research has shown that certain contraceptive methods can increase the risk of developing UTIs. Hormonal methods, particularly those containing estrogen, can affect the urinary tract and make it more susceptible to infections. Estrogen has been found to promote the growth of bacteria in the bladder, leading to frequent UTIs.
In addition, non-hormonal methods such as diaphragms and spermicides can also contribute to the occurrence of UTIs. These methods may cause irritation or allergic reactions in the genital area, leading to inflammation and making it easier for bacteria to invade the urinary tract.
Furthermore, the consistent use of condoms during sexual intercourse is recommended to reduce the risk of sexually transmitted infections (STIs) and UTIs. Condoms act as a barrier and prevent the exchange of bodily fluids, including bacteria that can cause UTIs.
It is important for women to be aware of the potential risks associated with certain contraceptive methods and take steps to minimize the likelihood of developing UTIs. This includes maintaining good hygiene practices, drinking plenty of water to flush out bacteria, and urinating before and after sexual intercourse to help eliminate any bacteria that may have entered the urinary tract.
If symptoms such as frequent urination, pain or burning during urination, or cloudy urine occur, it is essential to seek medical attention to get proper diagnosis and treatment. By understanding the relationship between contraceptive methods and UTIs, women can make informed decisions about their reproductive health and take necessary precautions to prevent infections.
Prevention of Urinary Tract Infections
Urinary tract infections (UTIs) can be prevented by taking certain precautions and adopting healthy habits. These infections usually occur when bacteria enter the urethra and travel to the bladder, causing symptoms such as frequent urination, burning sensation, and pain.
Maintain good hygiene
One key step in preventing UTIs is practicing good hygiene. This includes washing the genital area before and after sexual intercourse, as well as wiping from front to back after using the bathroom. By doing so, you can minimize the risk of introducing bacteria into the urethra.
Stay hydrated
Drinking an adequate amount of water can help prevent UTIs. It helps dilute urine, making it less concentrated and less likely to allow bacteria to thrive and multiply. Additionally, staying hydrated promotes more frequent urination, which can flush out bacteria from the bladder and urinary tract.
In conclusion, preventing UTIs involves maintaining good hygiene practices and staying hydrated. By taking these simple measures, you can reduce your risk of developing a urinary tract infection and its associated symptoms.
Question and answer:
What is a urinary tract infection?
A urinary tract infection (UTI) is an infection that affects any part of the urinary system, including the kidneys, bladder, ureters, and urethra.
What are the symptoms of a urinary tract infection?
The symptoms of a urinary tract infection can include pain or a burning sensation during urination, frequent urge to urinate, cloudy or bloody urine, strong-smelling urine, low-grade fever, and pelvic pain.
How are urinary tract infections diagnosed?
Urinary tract infections are diagnosed through a physical examination, a review of symptoms, a urine sample, and sometimes a urine culture to identify the specific type of bacteria causing the infection.
What are the causes of urinary tract infections?
Urinary tract infections are primarily caused by bacteria entering the urethra and traveling up into the urinary system. The most common type of bacteria that causes UTIs is Escherichia coli (E. coli). Other factors that can increase the risk of UTIs include sexual activity, holding urine for too long, certain medical conditions such as diabetes, and weakened immune system.
How can urinary tract infections be prevented?
Urinary tract infections can be prevented by drinking plenty of water, urinating frequently, wiping from front to back after using the toilet, avoiding irritating feminine products, wearing breathable underwear, and practicing safe sexual behaviors. It is also important to maintain good hygiene and keep the genital area clean.
What is a urinary tract infection?
A urinary tract infection (UTI) is an infection that occurs in any part of the urinary system, which includes the kidneys, bladder, ureters, and urethra.