Adipose tissue is a connective tissue, more specifically a loose (specialized) connective tissue made mostly of fat cells called adipocytes.

Quick Scoop

  • Adipose tissue = body fat.
  • It belongs to the connective tissue family, not epithelial, muscle, or nervous tissue.
  • Structurally, it is classified as a loose connective tissue because its cells are packed with fat but the supporting fiber network is relatively delicate.

A Bit More Detail

Adipose tissue is made up mostly of adipocytes, which store fat in large lipid droplets and are supported by a fine mesh of collagen fibers and blood vessels. Because of this structure and its origin, histology and anatomy texts group it as a specialized loose connective tissue rather than as an epithelial lining or contractile (muscle) tissue.

Functionally, this tissue stores energy, cushions organs, provides insulation, and even acts as an endocrine organ by releasing hormones that influence metabolism and appetite. There are different types—white, brown, and beige adipose tissue—but all of them still fall under the broader category of connective tissue.