Adipose tissue is one of the many different types of connective tissue found in the human body. Connective tissue composes the dermis of the skin. Unlike the cells of the epithelial layer of the epidermis, which are crowded close together, the cells of connective tissue are scattered far apart with many fibers between them. Adipose tissue (fat cells) is a metabolically active tissue that acts as a reserve supply of energy by storing fat and releasing it in response to a variety of nervous and hormonal stimuli. It also acts as an insulator to help maintain body temperature and acts as a protective padding in certain areas. Adipose tissue also helps smooth out the contours of the body. Adipose tissue is also found in bone marrow.