adipose is found
Because brown adipose cells function primarily as energy consumers and white adipose cells function primarily as energy stores, the common origin of these cells has been debated. In general, brown and white adipose cells are not found together; they form distinct tissues. Research has shown that brown adipose cells and muscle cells originate from the same precursor cells. The precursor cells are directed toward development into brown adipose cells by a specific protein, and, in the absence of this protein cue, the precursor cells become muscle cells. Two types of adipose tissue are found in animals: white adipose tissue and brown adipose tissue. Brown adipose tissue is present in significant amounts in human infants. Its distriburion is very limited in the adult, where it is found in the mediastinum, the subcutaneous tissue between the scapula, the area around the kidney and the area along the aorta. 1 Adipose tissue, which is in part made up of adipose cells, acts as a fuel reserve and helps conserve the heat of the body. 2  Studies have shown that when old adipose cells die they are replaced by new cells and that in adult humans the number of adipose cells in the body is relatively stable. As a result, fat storage is accomplished through the expansion of existing adipose cells instead of through an increase in the number of cells. Adipose tissue is a highly specialized loose connective tissue designed to store large quantities of triacylglycerols (triglycerides) and fat-soluble substances. It is classified as a connective tissues due, in part, to the fact that its is derived from embryonic mesenchyme. Each adipose cell, or adipocyte, stores lipid in cytoplasmic inclusions called lipid droplets. Two types of adipose tissue are found in animals: white adipose tissue and brown adipose tissue. Brown adipose tissue is present in significant amounts in human infants. 1  Its distriburion is very limited in the adult, where it is found in the mediastinum, the subcutaneous tissue between the scapula, the area around the kidney and the area along the aorta. There are two types of adipose cells: white adipose cells contain large fat droplets, only a small amount of cytoplasm, and flattened, noncentrally located nuclei; and brown adipose cells contain fat droplets of differing size, a large amount of cytoplasm, numerous mitochondria, and round, centrally located nuclei. View Full Document. Much of the body's adipose tissue is found in the hypodermis, but it is also abundant in the mesenteries and forms cushioning pads around the kidneys and behind the eyeballs. Most adipose tissue is white, but there is a small amount of brown adipose tissue that produces heat and consumes nutrients. Function - reserve food fuel, insulates against heat loss, supports and protects organs. ii. Fibers - Matrix is similar to areolar, but very sparse. While shares many physiological characteristics with white adipose tissue, it displays some distinctive histologic and physiologic characteristics: 1  Brown adipocytes are small cells that contain a centrally-placed nucleus and large numbers of mitochondria. 1 Adipose tissue, which is in part made up of adipose cells, acts as a fuel reserve and helps conserve the heat of the body. In times of significant energy expenditure (e.g., exercise) or lack of adequate energy intake (e.g., fasting), adipose cells secrete fatty acids, which can be used by muscles and other tissues as a source of energy. Fats, in the form of triglycerides, accumulate in the fat cells found in and around the muscles of the animal. Fat deposits that surround the muscles are called adipose tissue, while fat that is depos... Adipose, or fat, cells are connective-tissue cells that are specialized for the synthesis and storage of reserve nutrients. Subcutaneously, white adipose tissue forms a distinct tissue layer beneath the dermis of the skin called the panniculus adiposus or hypodermis. Viscerally, white adipose tissue is generally found in significant amounts in the omentum and mesentery and around the kidneys and heart.
Much of the body's adipose tissue is found in the hypodermis, but it is also abundant in the mesenteries and forms cushioning pads around the kidneys and behind the eyeballs.