1. Excretory System

2. Porifera
Excretion is regulated by
diffusion

3. Chordata Two Major Organs
Kidney
Liver

4. (Fishes, Amphibians, Reptiles, Aves, Mammals)
Kidneys
All Classes!
(Fishes, Amphibians, Reptiles, Aves, Mammals)

5. Kidneys Functions: -excrete waste products
-regulate water and salt balance
Kidneys do this by filtering blood and producing urine.
Excretion

6. Kidneys 400 Kidney’s filter your blood continuously.
They filter your entire blood supply (5 liters) approximately
400
times a day!

7. Liver 1 Class Functions: -detoxify the blood
(Mammals)
Functions:
-detoxify the blood
The liver does this with enzymes that chemically alter many substances, such as alcohol, before the blood reaches other body parts.

8. Other
Invertebrates

9. All excretory system lack
Kidneys
and a liver
All excretory system lack

10. Homeostasis?