human epithelial cells

Human epithelial cells form a protective layer covering the body's surfaces and internal organs. They line the skin, as well as the inside of blood vessels, digestive tract, and respiratory pathways. These cells create a barrier, preventing pathogens and toxins from entering the body, and also play a role in absorption, secretion, and sensation. Epithelial cells are tightly packed, providing a sturdy, organized lining, and some have specialized functions like cilia to move mucus or tiny hairs for sensing. Their flexibility and diversity are essential for maintaining health and responding to environmental changes.