What are the structural and functional units of excretion inside the kidneys of man?

Explanation

**Step-by-Step Text Solution:**

1. **Introduction to Kidneys**: The human body contains two kidneys, which are vital organs responsible for the excretion of waste products and the regulation of various bodily functions.

2. **Structural and Functional Unit**: The primary structural and functional units of excretion within the kidneys are called **nephrons**. Each kidney contains millions of nephrons, which perform the essential tasks of filtering blood and forming urine.

3. **Structure of Nephron**: A nephron consists of two main parts:
- **Glomerulus**: This is a tuft of capillaries that plays a crucial role in the filtration of blood. It is formed by the efferent arteriole.
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