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. Metabolic Wastes WasteWhere Produced Where Removed Process Producing Waste CO 2 ALL cellsLungs Cellular Respiration H2OH2OALL cells Lungs, Kidneys, Sweat Glands Cellular Respiration Nitrogenous Waste Digestive Organs, Liver Liver, Kidneys Protein Metabolism Mineral Salts ALL cells Kidneys, Sweat Glands Misc. Metabolic activities

9. 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

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

11. 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

12. The Nephron 1. 2. 3.Capillaries

13. Excretory Disorders

14. 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!

15. Excretory Disorders: Kidney Disease Can result from mild infections to chronic, congenital disease. Signs are anemia, nocturnal frequency, hypertension and protein in the urine. Polycystic kidney

16. KRAMER: I got a stone. JERRY: What stone? KRAMER: A kidney stone. JERRY: What is that, anyway? KRAMER: It's a, it's a stony mineral concretion, formed abnormally in the kidney. And this jagged shard of calcium pushes its way through the ureter into the bladder. It's forced out through the urine! JERRY: Oh, that's gotta hurt. Kidney Stones

17. Excretory Disorders: Gout

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

19. Final Thoughts complaining