Part 1 of the Human Excretion Note 1 covers the following objectives:
1. Define excretion and explain the importance of removing nitrogenous and other compounds from the body.
2. Outline the structure and function of the urinary system.
3. Outline the structure and how the kidneys function based on the structure of nephrons
4. Outline the process of urine formation based on ultrafiltration, reabsorption and secretion.