Squamous epithelial

Definition

Squamous epithelial cells are flat, scale-like cells that form the outer layer of epithelial tissue. They are specialized for diffusion and filtration due to their thin structure.

5 Must Know Facts For Your Next Test

1. Squamous epithelial cells are found lining surfaces such as the skin, blood vessels, and alveoli in lungs.
2. There are two main types: simple squamous epithelium (single layer) and stratified squamous epithelium (multiple layers).
3. Simple squamous epithelium is involved in processes like osmosis and filtration.
4. Stratified squamous epithelium provides protection against abrasion and is found in areas subject to wear and tear, such as the skin.
5. These cells play a crucial role in the exchange of gases in the lungs and nutrient absorption in capillaries.

Review Questions

• Where can you find squamous epithelial cells in the human body?
• What is the primary function of simple squamous epithelium?
• How does stratified squamous epithelium differ from simple squamous epithelium?

Related terms

Cuboidal Epithelial Cells: These are cube-shaped cells that line glandular ducts and are involved in secretion and absorption.

Columnar Epithelial Cells: These tall, column-shaped cells line organs like the digestive tract and specialize in absorption and secretion.

Basement Membrane: This thin layer of extracellular matrix anchors epithelial tissues to underlying connective tissues.