Epithelial tissue covers the surfaces of the body, both inside and out. It forms the skin, lining of the mouth, digestive tract, and many other organs. The primary functions of epithelial tissue include protection, absorption, secretion, and sensation.
- Protection: Epithelial tissue acts as a barrier against mechanical injury, pathogens, and fluid loss. - Absorption: In the intestines, epithelial cells absorb nutrients from digested food. - Secretion: Glands made of epithelial cells secrete hormones, enzymes, and other essential substances. - Sensation: Epithelial cells in sensory organs detect stimuli from the environment.
