Epithelial tissues serve several critical functions in the body, including:
Protection: They protect underlying tissues from mechanical injury, harmful chemicals, pathogens, and dehydration. Absorption: Epithelial tissues in the digestive tract absorb nutrients from food. Secretion: Glandular epithelia produce and secrete substances such as enzymes, hormones, and mucus. Excretion: Certain epithelia help in the excretion of waste products. Sensation: Epithelial tissues contain nerve endings that respond to stimuli.
