Dictionary > Adipocyte

Adipocyte

Definition
noun, plural: adipocytes
A specialized connective tissue cell that stores fat (lipid); the predominant cell in the adipose tissues
Supplement
In animals, the connective tissue is one of the major types of tissues and its main functions are to provide structural support and to connect tissues and organs. The cellular elements of the connective tissues are adipocytes, fibroblasts, and blood cells (such as macrophages, mast cells, etc.).
The adipocytes are specialized type of connective tissue cells in the adipose tissue. They comprise the bulk of the adipose tissues. Other cells (collectively called stromal vascular fraction) are present in relatively fewer number. In general, the adipocytes are bloated with globules of triglycerides. The nucleus is displaced to one side and the cytoplasm is seen as a thin line around the fat droplet.
The main function of adipocytes is to store fat. Apart from serving as a source of energy in the form of fat, the adipose tissue is also important in providing cushion, thermal insulation of vital organs, lubrication (chiefly in the pericardium), and hormones (such as leptin). There are two major types of adipose tissues: (1) white adipose tissue and (2) brown adipose tissue.
The white adipose tissue is comprised of white fat cells. These adipoctytes are monovacuolar. The cell has a large lipid droplet in its cytoplasm and a flattened nucleus at the periphery. The fat molecules contained in these adipocytes are primarily triglycerides and cholesteryl ester.
The brown adipose tissue has a darker colour. Its main function is to generate body heat. The brown fat cells are plurivacuolar. The adipocyte in this tissue contains several smaller droplets, with round nucleus that is eccentrically located, and more mitochondria (which accounts for the brownish color). The brown adipose tissue has more capillaries than white adipose tissue has.
Synonym(s):

  • fat cell
  • lipocyte

See also:

  • adipose tissue


  • You will also like...

    genes controlling growth and development
    Control of Growth & Development

    Control of Growth & Development tutorials look at how the genetic makeup determines the biological processes on a da..

    Principles of Hormonal Control Systems
    Principles of Hormonal Control Systems

    Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..

    Plant Auxins
    Plant Auxins – Phototropism & Geotropism

    Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..

    "Opabinia regalis"
    The Evolutionary Development of Multicellular Organisms

    Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..

    Neurology of Illusions
    Neurology of Illusions

    Illusions are the perceptions and sensory data obtained from situations in which human error prevents us from seeing the..

    Pink Lotus plant on a pond
    Freshwater Lentic Communities & Animals

    This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..

    Related Articles...

    No related articles found

    See all Related Topics