Origin: mesenhyme, adventitial cells
Composition: ground substance, connective fibers, adipose cells.
Location: hypodermis (panniculus adiposus under the skin), omentum, mesentery, retroperitoneal space, around the kidneys, breast.
Function: energy and water storage, insulation, cushioning of vital organs.
Location: hibernating animals, newborn humans.
Function: source of heat and lipid, thermoregulation