What type of tissue primarily consists of fat cells?

Adipose tissue is primarily composed of fat cells, known as adipocytes. This specialized form of connective tissue serves several important functions in the body, including energy storage, insulation, and cushioning of organs. It plays a critical role in regulating metabolism and the hormone leptin, which is involved in appetite and energy balance.

In contrast to other tissue types mentioned in the choices, adipose tissue's main characteristic is its high lipid content due to the predominant presence of fat cells. Nervous tissue is designed for transmitting signals and communication within the body, muscle tissue is responsible for movement, and fibrous tissue mainly provides structural support and strength. Each of these tissue types has unique properties and functions that distinctly differ from those of adipose tissue.