2. Excretory System Any system that eliminates wastes

3. Included in excretory system are: Digestive-water and undigested food out Respiratory- carbon dioxide and water out Skin (Integumentary)- sweat and salts out Urinary-water, metabolic wastes and salts out

4. Urinary System: Function It filters your blood and removes wastes produced by your cells Fluid levels in the body are also maintained by the urinary system

5. Organs: Kidneys (2) Filters all the blood in your body every 5 minutes Blood enters the kidney, then excess sugars, salts, and wastes are removed Purified blood is returned to the circulatory system

6. http://www.youtube.com/watch?v=TzwPmz5V6Xg

7. Cross-section of a human kidney

8. Organs: Ureter Water, salts, and other wastes flow from the kidneys to the bladder through the ureters. Ureters

9. Organs: Bladder Excess waste and water are stored in the bladder About 1 L of urine is produced each day Bladder

10. Organs: Urethra Water exits the body through a tube called the urethra Urethra

11. Urinary System: Problems When kidneys don’t filter wastes, the body is slowly poisoned. High levels of glucose (sugar) can signal diabetes. Dialysis: a machine that can do the job of a broken or missing kidney. It will filter the blood.

12. Dialysis

13. Kidney Stones

14. Urinary Tract Infections (UTI)

15. Urine Color

16. Blood or food MedicineToo much water Not enough water Medicine or food Healthy! Medicine or food Blood or food

17. Review Movie http://www.youtube.com/watch?v=AgDUmx7wSnw

18. Review Quiz

19. Name the organs A B C D A-Kidney B-Ureter C-Bladder D-Urethra

20. What system do kidneys work with? Circulatory System

21. What is done if kidneys don’t work properly? Blood is filtered in a dialysis machine

22. Why should women wipe front to back? To avoid getting bacteria in their urethra

23. What color urine signals that you are healthy? Pale yellow (like hay)

24. Excretory Lab

27. Results Sand Water, food coloring, salt

28. Conclusion 1.Did all the materials pass through the filter paper? Why or why not? 2. What part of the model is like the kidney? 3. What part of the model is like the blood? 4. What materials from this lab would end up in the urine? 5. How is this demonstration similar to the job of the kidneys? 6. What would happen if our kidneys did not function properly and were unable to filter out waste materials?