Transitional

Definition

Transitional epithelium is a type of epithelial tissue specialized to stretch and recoil. It lines organs that need to expand, such as the bladder.

5 Must Know Facts For Your Next Test

1. Transitional epithelium is composed of multiple layers of cells that can change shape based on the degree of stretching.
2. This type of tissue is found lining the urinary bladder, ureters, and part of the urethra.
3. The cells in transitional epithelium are dome-shaped when relaxed and become flattened when stretched.
4. Transitional epithelium provides a barrier against urine, protecting underlying tissues from its potentially harmful effects.
5. It allows organs to maintain a protective lining while accommodating fluctuations in fluid volume.

Review Questions

• Where in the body can you find transitional epithelium?
• How does the appearance of transitional epithelial cells change with stretching?
• What functional advantage does transitional epithelium provide to organs like the bladder?

Related terms

Epithelium: Tissue composed of layers of cells that cover organ surfaces or form glands.

Stratified Epithelium: Type of epithelial tissue made up of multiple cell layers, providing protection against abrasion.

Simple Epithelium: Epithelial tissue consisting of a single layer of cells, typically involved in absorption or filtration processes.