2. EXCRETION

3. WARNING The next slide is not for those with a weak gag reflex!

4. Excretion Is…. Urine, Pee-pee, #1, peeps, whiz, tinkle, etc. Excretion is the removal of ________________ waste. metabolic Metabolism is any ___________________ occurring INSIDE the body that keeps us alive. Ex: cell respiration, enzyme reactions, immune responses, etc. chemical reaction OR

5. How do other organisms excrete? Just taking a pee break! Some organisms like worms excrete through their ______ and into their _____________. skinenvironment Many single celled organisms live in ________ where we sometimes ______! How? water swim Guess where THEY excrete?!

6. What about plants? Plants excrete __________ and _______ through their _________ and lenticles. water vapor oxygen stomates What else do plants excrete? HINT: “All organisms…”

7. How do we excrete? 1. Sweat 2. Pee pee (okay…urinate) 3. Exhale

8. Human Excretory Organs…yee ha! 1. Skin (this is from a website that really sells “skin” bags! Okay..they are synthetic though!) 2. Kidney 3. Sweat Glands 4. Liver 6. Lungs 5. Urinary Bladder

9. The Sweat Gland How much more fun could we have?? 1. Sweat Gland 2. Blood Vessels 3. Pore 4. Capillaries

10. The Urinary Tract 1. Kidney: made of millions of Nephrons 4. Ureter 5. Urinary Bladder 6. Urethra 2. Artery: carries blood to the kidneys to be filtered 3. Vein: returns clean blood to the heart

11. The Nephron 1. 2. 3.Capillaries

12. Excretory Disorders

13. Excretory Disorders: Water Intoxication Water intoxication results from a disturbance in the normal electrolyte balance (particularly sodium levels) in the blood from drinking too much water. It can cause a dangerous swelling of the brain and central nervous system which can prove fatal. The kidneys cannot filter large amounts of excess water fast enough. Click on picture for News Clip!

14. Excretory Disorders: Kidney Disease Kidney Disease is anything that prevents the kidney from doing its job. Can result from mild infections to chronic, congenital (inherited) disease. Polycystic kidney

15. Caused by crystals forming in the kidney. Can be from a high calcium diet, genetics or not taking in enough water. These sharp crystals must pass through your ureter, bladder and urethra! Kidney Stones

16. Excretory Disorders: Gout Gout is caused when Uric Acid (found in the urine) crystalizes in our joints. Especially in our feet! This causes pain and swelling.

17. EXCRETION CirculationDigestionRespiratory HOMEOSTASIS…How do other body systems help?

18. Final Thoughts complaining