2. Lesson 3 How can you ensure a healthy urinary system? The Urinary System Include healthful sources of fluids to help maintain the function of your urinary system.

3. Lesson 3 Lesson Objectives Describe the structures and functions of the urinary system Examine the effects of health behaviors on the urinary system Identify the problems and warning signs of the urinary system In this lesson, you will learn to:

4. Lesson 3 What Does the Urinary System Do? The main function of the urinary system is to filter waste and extra fluid from the blood. Urine consists of water and body wastes that contain nitrogen, which become toxic to cells if they remain in the body for too long.Urine Function of the Urinary System

5. Lesson 3 The Kidneys The kidneys remove waste products from the blood through tiny filtering units called nephrons.nephrons Each nephron consists of a ball formed of small capillaries, called a glomerulus, and a small tube called a renal tubule that functions as a filtering funnel. Function of the Urinary System

6. Lesson 3 How Does the Kidney Work? The kidneys adjust the amount of salts, water, and other materials excreted in the urine according to the body’s needs. When the blood and body fluids become too acidic or too alkaline, the kidneys alter the acidity of the urine to restore the balance. When the body becomes dehydrated, the pituitary gland releases antidiuretic hormone (ADH), stimulating thirst and allowing the kidney to balance the fluid levels in the body. Function of the Urinary System

7. Lesson 3 From the kidneys urine travels to the bladder through the ureters.bladder ureters Muscles in the ureter walls tighten and relax to force urine down and away from the kidneys. The Ureters Function of the Urinary System

8. Lesson 3 Located in the pelvic cavity, the bladder is held in place by ligaments attached to other organs and to the pelvic bones. Until the bladder is ready to be emptied, sphincter muscles close tightly around the opening into the urethra.urethra The Bladder and the Urethra Function of the Urinary System

9. Lesson 3 Kidney Structure and Function Click image to view movie. Function of the Urinary System

10. Lesson 3 Maintaining a Healthy Urinary System Drink at least eight 8-ounce glasses of water each day, and limit your intake of caffeine and soft drinks. Eat a well-balanced diet. Practice good hygiene and personal health care. Have regular medical checkups. Health Behaviors and the Urinary System

11. Lesson 3 Urinary System Infections Urinary system problems can result from several different conditions, including infection and blockage of urine. Problems of the Urinary System Cystitis is most often caused by a bacterial infection, which can spread to the kidneys.Cystitis Urethritis can be caused by a bacterial infection.Urethritis Symptoms of both conditions include burning pain during urination, increased frequency of urination, fever, and the presence of blood in the urine. Treatment includes antibiotics to eliminate infection.

12. Lesson 3 Kidney Problems Nephritis is the inflammation of the nephrons. Kidney stones form when salts in the urine crystallize into a solid stone, usually containing calcium. Uremia is a serious condition associated with a decrease in blood filtration by the kidneys. Problems of the Urinary System

13. Lesson 3 Kidney Failure Kidney failure can be acute, meaning sudden onset, or chronic, in which case the kidneys progressively lose their ability to function. Treatment includes reducing symptoms and slowing the progression of the disease. If kidney damage is extensive, dialysis or a kidney transplant may be required. A kidney transplant involves the replacement of a nonfunctional kidney with a healthy kidney from a donor. Problems of the Urinary System

14. Lesson 3 Types of Dialysis In hemodialysis a needle connected to plastic tubing passes blood from the patient to a machine that filters the blood and returns it in much the same manner that a healthy kidney would.hemodialysis Hemodialysis Peritoneal Dialysis Problems of the Urinary System

15. Lesson 3 1.ureters 2. nephrons 3.kidney stones 4. uremia Choose the appropriate option. Q. The __________ are tubes that connect the kidneys to the bladder. Quick Review

16. Lesson 3 A. 1. ureters The ureters are tubes that connect the kidneys to the bladder. Click Next to attempt another question. Quick Review - Answer

17. Lesson 3 True False Q. The main function of the urinary system is to filter waste and extra fluids from the blood. Choose the appropriate option. Quick Review

18. Lesson 3 Click Next to attempt another question. Quick Review - Answer A. True. The main function of the urinary system is to filter waste and extra fluids from the blood.

19. Lesson 3 True False Q. The urethra is a tube that leads from the bladder to the outside of the body. Choose the appropriate option. Quick Review

20. Lesson 3 Click Next to attempt another question. A. True. The urethra is a tube that leads from the bladder to the outside of the body.

21. Lesson 3 True False Q. Early detection and warning signs are less important for young people in seeking health care for urinary system problems. Choose the appropriate option. Quick Review

22. Lesson 3 Click Next to attempt another question. Quick Review - Answer A. False. Early detection and warning signs are important for young people in seeking health care for urinary system problems.

23. Lesson 3 End of Lesson 3 Click Home to view the Main menu.

24. Lesson 3 Quick Review - Answer Click Next to attempt another question. A. Correct! The ureters are tubes that connect the kidneys to the bladder.

25. Lesson 3 You have answered the question incorrectly. Go back to try again, or click Next to view the correct answer. Quick Review - Answer

26. Lesson 3 Quick Review - Answer Click Next to attempt another question. A. Correct! The main function of the urinary system is to filter waste and extra fluids from the blood.

27. Lesson 3 You have answered the question incorrectly. Go back to try again, or click Next to view the correct answer. Quick Review - Answer

28. Lesson 3 Quick Review - Answer Click Next to attempt another question. A. Correct! The urethra is a tube that leads from the bladder to the outside of the body.

29. Lesson 3 You have answered the question incorrectly. Go back to try again, or click Next to view the correct answer. Quick Review - Answer

30. Lesson 3 Quick Review - Answer Click Next to attempt another question. A. Correct! Early detection and warning signs are important for young people in seeking health care for urinary system problems.

31. Lesson 3 You have answered the question incorrectly. Go back to try again, or click Next to view the correct answer. Quick Review - Answer

32. Lesson 3 The main function of the urinary system is to filter waste and extra fluid from the blood. Urine consists of water and body wastes that contain nitrogen, which become toxic to cells if they remain in the body for too long.Urine What Does the Urinary System Do? Urine is liquid waste material. Urine is liquid waste material. Function of the Urinary System

33. Lesson 3 The kidneys remove waste products from the blood through tiny filtering units called nephrons.nephrons Each nephron consists of a ball formed of small capillaries, called a glomerulus, and a small tube called a renal tubule that functions as a filtering funnel. The Kidneys Nephrons are the functional units of the kidneys. Function of the Urinary System

34. Lesson 3 From the kidneys urine travels to the bladder through the ureters. Muscles in the ureter walls tighten and relax to force urine down and away from the kidneys. The Ureters The bladder is a hollow muscular organ that acts as a reservoir for urine. Function of the Urinary System

35. Lesson 3 From the kidneys urine travels to the bladder through the ureters. Muscles in the ureter walls tighten and relax to force urine down and away from the kidneys. The Ureters The ureter is a tube that connects the kidneys to the bladder. Function of the Urinary System

36. Lesson 3 Located in the pelvic cavity, the bladder is held in place by ligaments attached to other organs and to the pelvic bones. Until the bladder is ready to be emptied, sphincter muscles close tightly around the opening into the urethra. The Bladder and the Urethra The urethra is a tube that leads from the bladder to the outside of the body. Function of the Urinary System

37. Lesson 3 Urinary system problems can result from several different conditions, including infection and blockage of urine. Cystitis is most often caused by a bacterial infection, which can spread to the kidneys.Cystitis Urethritis can be caused by a bacterial infection.Urethritis Symptoms of both conditions include burning pain during urination, increased frequency of urination, fever, and the presence of blood in the urine. Treatment includes antibiotics to eliminate infection. Urinary System Infections Cystitis is an inflammation of the bladder. Problems of the Urinary System

38. Lesson 3 Urinary system problems can result from several different conditions, including infection and blockage of urine. Cystitis is most often caused by a bacterial infection, which can spread to the kidneys.Cystitis Urethritis can be caused by a bacterial infection.Urethritis Symptoms of both conditions include burning pain during urination, increased frequency of urination, fever, and the presence of blood in the urine. Treatment includes antibiotics to eliminate infection. Urinary System Infections Urethritis is the inflammation of the urethra. Problems of the Urinary System

39. Lesson 3 In hemodialysis a needle connected to plastic tubing passes blood from the patient to a machine that filters the blood and returns it in much the same manner that a healthy kidney would.hemodialysis Hemodialysis Hemodialysis is a technique in which an artificial kidney machine removes waste products from the blood. Types of Dialysis Peritoneal Dialysis Problems of the Urinary System

40. Lesson 3 Types of Dialysis In hemodialysis a needle connected to plastic tubing passes blood from the patient to a machine that filters the blood and returns it in much the same manner that a healthy kidney would.hemodialysis HemodialysisPeritoneal dialysis Peritoneal dialysis uses the peritoneum, a thin membrane that surrounds the digestive organs, to filter the blood. A catheter is inserted into the abdominal cavity to remove toxins. Hemodialysis Peritoneal Dialysis Problems of the Urinary System