What is the significance of epithelial tissue in animals?

Epithelial tissue plays a crucial role in the structural organisation of animals. It covers the body surfaces, lines body cavities, and forms glands. Here are some key points:

• Protection: It acts as a barrier to protect the underlying tissues from mechanical injury, harmful chemicals, and pathogens.
• Absorption: In the intestines, epithelial cells absorb nutrients from digested food.
• Secretion: Epithelial tissues in glands secrete enzymes, hormones, and other essential substances.
• Excretion: It helps in the removal of waste products from the body.
• Sensation: Specialized epithelial cells can sense stimuli.

Overall, epithelial tissue is essential for maintaining the body’s integrity and functionality.