Which tissues form the body's glands, cover the surface of the body, and line the cavities?

Epithelial tissues play a crucial role in the body as they are responsible for forming glands, covering the surfaces of the body, and lining various cavities. This type of tissue comes in various shapes and arrangements, which allows it to perform multiple functions effectively.

Epithelial tissue serves as a protective barrier, shielding underlying structures from physical damage, pathogens, and dehydration. It also participates in absorption, secretion, and sensation. Glands, which can be either endocrine (secreting hormones directly into the bloodstream) or exocrine (secreting substances into ducts), are composed of specialized epithelial cells.

In addition to these functions, epithelial tissue lines body cavities, such as the pleural, peritoneal, and pericardial cavities, providing a smooth surface that aids in movement and reduces friction between organs. The diverse roles of epithelial tissue highlight its fundamental importance in maintaining homeostasis and overall bodily function.