Introduction to human excretory system.

1. Excretory System
K.Kamatchi
Assistant Professor
Department of Zoology
Vivekananda College
Tiruvedakam West

2. Excretion
Separation and elimination of the
nitrogenous metabolic wastes.
Excretory organs.

3. Excretory Products
Amino acid - Limnaea
Ammonia – Aquatic animals
Urea – Earthworms - Mammals
Uric acid – Insects, Reptiles, Birds

4. Classification of Animals on the basis of
Excretory Products
Ammonotelic Animals
Ureotelic Animals
Uricotelic Animals

5. Classification of Animals on the basis of
Excretory Products
Ammonotelic Animals
Aquatic animals
Advantages of Ammonia Excretion
Prevention of Energy loss
Ionic Regulation

9. Formation of Urine
Ultrafiltration
Reabsorption
Secretion

12. Thank you