Chylomicron
A small fat globule composed of protein and lipid (fat). Chylomicrons are found in the blood and lymphatic fluid where they serve to transport fat from its port of entry in the intestine to the liver and to adipose (fat) tissue. After a fatty meal, the blood is so full of chylomicrons that it looks milky. The word "chylomicron" is made up of "chylo-", milky + "micron", small. = small milky (globules). The chylomicrons are synthesized (made) in the mucosa (the lining) of the intestine.
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A large lipid droplet (between 0.8 and 5 nm in diameter) of reprocessed lipid synthesized in epithelial cells of the small intestine and containing triacylglycerols, cholesterol esters, and several apolipoproteins ( e.g., A-I, B-48, C-I, C-II, C-III, E); the least dense (less than 1.006 g/mL) of the plasma lipoproteins that functions as a transport vehicle. [chylo- + G. micros, small]

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chy·lo·mi·cron .kī-lō-'mī-.krän n a lipoprotein rich in triglyceride and common in the blood during fat digestion and assimilation

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n.
a microscopic particle of fat present in the blood after digested fat has been absorbed from the small intestine.

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chy·lo·mi·cron (ki″lo-miґkron) [chylo- + Gr. mikros small] a class of lipoproteins that transport exogenous (dietary) cholesterol and triglycerides from the small intestine to tissues after meals. Synthesized in the intestinal mucosa and carried via the intestinal lacteals and lymphatic system to the bloodstream, they are then degraded to chylomicron remnants (q.v.) in the capillaries of muscle and adipose tissue via cleavage of the majority of their triglycerides by endothelial lipoprotein lipase. These remnants are rapidly cleared by the liver via receptor-mediated endocytosis.

Medical dictionary. 2011.

Look at other dictionaries:

  • Chylomicron — structure ApoA, ApoB, ApoC, ApoE (apolipoproteins); T (triacylglycerol); C (cholesterol); green (phospholipids) Chylomicrons are lipoprotein particles that consist of triglycerides (85 92%), phospholipids (6 12%), cholesterol (1 3%) and proteins …   Wikipedia

  • chylomicron — [kī΄lō mī′krän΄] n. pl. chylomicra [kī΄lō mī′krə] or chylomicrons [ CHYL(E) + O + MICRON] a micron sized particle that contains mostly triglycerides with some protein, found in the blood and lymph, esp. after fat is eaten …   English World dictionary

  • chylomicron — noun Etymology: Greek chylos + mikron, neuter of mikros small more at micro Date: 1921 a lipoprotein rich in triglyceride and common in the blood during fat digestion and assimilation …   New Collegiate Dictionary

  • Chylomicron — Les chylomicrons sont des lipoprotéines qui se forment en période de digestion. Elles sont responsables du transport des lipides de l intestin grêle vers les tissus adipeux périphériques où ils sont retraités. Lors de l absorption, les divers… …   Wikipédia en Français

  • chylomicron — Colloidal fat globule found in blood or lymph; used to transport fat from the intestine to the liver or to adipose tissue. Has a very low density, a low protein and high triacylglyceride content …   Dictionary of molecular biology

  • chylomicron — /kuy leuh muy kron/, n. Biochem. a large plasma lipoprotein particle, occurring as a droplet consisting primarily of triglycerides and functioning in the transport of neutral lipids from the intestine to the tissues by way of the lymph. [1920 25; …   Universalium

  • chylomicron — noun A microscopic globule of lipoprotein, found in blood and lymph, that is associated with the digestion of fats …   Wiktionary

  • chylomicron — chy·lo·mi·cron …   English syllables

  • chylomicron — n. a lipoprotein particle present in the blood after digested fat has been absorbed from the small intestine. The lipid portion consists largely of triglycerides, which are released by the action of lipoprotein lipase …   The new mediacal dictionary

  • chylomicron — chy•lo•mi•cron [[t]ˌkaɪ ləˈmaɪ krɒn[/t]] n. biochem. a lipoprotein droplet that forms in the small intestine and conveys fat to the blood • Etymology: 1921 …   From formal English to slang

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