Definition

1. Noun:
   • A type of epithelial cell: A squamous cell is a flat, scale-like cell. These cells form a single, thin layer in epithelial tissue, which lines the surfaces and cavities of the body.

Usage

• The term "squamous cell" is primarily used in medical and biological contexts to describe a specific cell shape and structure.
• It is often part of the name for tissues (e.g., squamous epithelium) or medical conditions (e.g., squamous cell carcinoma).

Examples

• Noun:
  • The lining of the esophagus is composed of squamous cells.
  • Under the microscope, the pathologist identified abnormal squamous cells in the biopsy sample.
  • Squamous cells provide a smooth, protective barrier.

Advanced Usage

• "Squamous epithelium": A tissue composed of a single layer of these flat cells.
  • Simple squamous epithelium lines blood vessels and air sacs of the lungs.
• "Squamous metaplasia": A change where other cell types transform into squamous cells, often in response to chronic irritation.
  • Chronic bronchitis can lead to squamous metaplasia in the respiratory tract.

Variants and Related Words

• Squamous (adj): Describing something that is scale-like or flat.
  • The adjective "squamous" refers to the shape of the cell.
• Squamous cell carcinoma (n): A common form of skin cancer that begins in these cells.
  • Prolonged sun exposure is a major risk factor for squamous cell carcinoma.

Synonyms

• Epithelial cell (flat type): A more general term specifying the shape.
• Pavement cell: An older, less common synonym referring to the tile-like appearance of a layer of these cells.

Related Phrases

• "Layer of squamous cells": A common descriptive phrase in anatomy and histology.
  • The alveoli are covered by a thin layer of squamous cells for efficient gas exchange.

Noun

1. an epithelial cell that is flat like a plate and form a single layer of epithelial tissue