epithelsejteket
Epithelsejtek, also known as epithelial cells, are a type of cell that forms the epithelial tissue. Epithelial tissue is one of the four basic types of animal tissue, along with connective tissue, muscle tissue, and nervous tissue. Epithelial cells cover the surfaces of the body, both internally and externally. They line organs, cavities, and passages, and also form glands.
The primary functions of epithelial cells are protection, secretion, absorption, excretion, filtration, diffusion, and sensory reception.
Epithelial cells are characterized by their close packing, forming continuous sheets. They have distinct apical (free)