What type of tissue forms the skin and lines body cavities?

The correct answer is epithelial tissue because it serves as a protective barrier and is essential for covering surfaces and lining cavities within the body. Epithelial tissue consists of tightly packed cells that create layers, which can be single or multiple, depending on the location and specific function. This type of tissue plays a crucial role in protecting underlying structures, facilitating absorption and secretion, and enabling sensation. For example, the skin, as the outermost layer of the body, is primarily composed of epithelial tissue known as epidermis, which protects against environmental damage, pathogens, and dehydration.

In contrast, muscle tissue is responsible for movement, both voluntary and involuntary, and does not have a protective or lining function. Nervous tissue is involved in transmitting signals throughout the body for communication and coordination but does not form protective coverings. Connective tissue provides support and structure to the body, connecting different tissues and organs but does not line surfaces or cavities like epithelial tissue does.