What type of epithelial cells have irregular borders and are larger than white blood cells?

• A. Transitional epithelial cells
• B. Renal epithelial cells
• C. Squamous epithelial cells
• D. Cuboidal epithelial cells

Answer: (A)

Transitional epithelial cells are characterized by their irregular shapes and larger size compared to white blood cells. These cells are specifically found in the urinary tract, particularly lining the bladder, and they have the unique ability to stretch and change shape as the bladder fills and empties. This adaptability allows them to accommodate fluctuations in bladder volume without losing integrity.

Their irregular borders and size set them apart from other epithelial cell types. For instance, renal epithelial cells are typically smaller and more uniform, squamous epithelial cells are flat and thin, while cuboidal epithelial cells have a more regular shape and equal height and width. The unique properties and functions of transitional epithelial cells play a crucial role in the urinary system's ability to handle varying volumes of urine.