1. Objective: You will be able to identify and give the function of the human excretory organs. Do Now: Read 27:10 on p. 575 only Describe nephrons

2. Figure 44.6 Skin as an organ of thermoregulation

3. Excretory organs Skin- rids the body of excess water, salt and urine –Primarily used for regulating body temperature Lungs- Rid the body of excess water and CO2 Liver- Makes urea by breaking down amino acids (deamination) Kidney- filters the blood to remove wastes

4. Kidney Removes excess water, salts and urea from the body Made up of microscopic structures called nephrons –It is the nephrons of the kidney that actually filters the blood of the wastes

5. Urinary System

6. Figure 44.13 Nitrogenous wastes

8. Figure 44.21 The human excretory system at four size scales

9. Figure 44.22 The nephron and collecting duct: regional functions of the transport epithelium