Adipocytes, commonly known as fat cells, are specialized cells that store energy in the form of fat. They play a crucial role in maintaining the body's energy balance by accumulating excess calories and releasing them when needed. Adipocytes are primarily found in adipose tissue, which is distributed throughout the body, including under the skin and around internal organs. There are two main types of adipocytes: white adipocytes and brown adipocytes. White adipocytes store energy and help insulate the body, while brown adipocytes are involved in thermogenesis, generating heat by burning calories. Both types of adipocytes contribute to overall metabolism and energy regulation in the body.