Question
What is epithelial tissue? Give its characteristics and functions.
✓
Answer
Epithelial tissue is the simplest animal tissue which composed of one or more layer of cells covering external and internal body organs.
Characteristics of epithelial tissue:
Epithelial tissue performs following functions:
Characteristics of epithelial tissue:
- The cells of epithelial tissue are tightly packed and form continuous sheets.
- Epithelial cells have small amount of cementing material between them and almost no intercellular space.
- The surface of cells may be smooth, columnar or cuboidal.
- The cells of the lowermost layer rest on non-cellular basement membrane which separates it from the underlying connective tissue.
Epithelial tissue performs following functions:
- It protects the organs which it covers.
- It absorbs water and other nutrients inside the body.
- Some epithelial cells secrete ear wax, mucus and digestive juices.
- It keeps different organs separate.
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