The basic function of simple squamous epithelium is

Options

A. secretion
B. absorption
C. diffusion
D. excretion

Answer

**Step-by-Step Solution:**

1. **Definition of Simple Squamous Epithelium**: Simple squamous epithelium is a type of epithelial tissue that consists of a single layer of flat cells. The term "simple" indicates that it is a single layer, and "squamous" refers to the flat shape of the cells.

2. **Location**: This type of epithelium is primarily found in areas where rapid diffusion or filtration is necessary. Key locations include:
- The inner lining of blood vessels (endothelium).
- The walls of alveoli (air sacs) in the lungs.

3. **Function**: The primary function of simple squamous epithelium is to facilitate diffusion. This is crucial in:
- The alveoli, where oxygen and carbon dioxide diffuse between the air in the lungs and the blood.
- The blood vessels, where nutrients and waste products diffuse between the blood and surrounding tissues.

4. **Conclusion**: Therefore, the basic function of simple squamous epithelium is diffusion, allowing for the exchange of gases and small molecules.

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