Lacteal - wikipedia Lacteal Lacteal Transverse section of a villus, from the human intestine. X 350. a. Basement membrane, here somewhat shrunken away from the epithelium. b. Lacteal. c. Columnar epithelium. d. Its striated border. e. Goblet cells. f. Leucocytes in epithelium. f '. Leucocytes below epithelium. g. Bloodvessels. h. Muscle cells cut across. Villi of small intestine, showing bloodvessels and lymphatic vessels. Identifiers Anatomical terminology ( edit on Wikidata ) A lacteal is a lymphatic capillary that absorbs dietary fats in the villi of the small intestine. Triglycerides are emulsified by bile and hydrolyzed by the enzyme lipase, resulting in a mixture of fatty acids, di - and monoglycerides. These then pass from the intestinal lumen into the enterocyte, where they are re-esterified to form triglyceride. The triglyceride is then combined with phospholipids, cholesterol ester, and apolipoprotein B48 to form chylomicrons. These chylomicrons then pass into the lacteals, forming a milky substance known as chyle. The lacteals merge to form larger lymphatic vessels that transport the chyle to the thoracic duct where it is emptied into the bloodstream at the subclavian vein. At this point, the fats are in the bloodstream in the form of chylomicrons. Once in the blood, chylomicrons are subject to delipidation by lipoprotein lipase. Eventually, enough lipid has been lost and additional apolipoproteins gained, that the resulting particle ( now referred to as a chylomicron remnant ) can be taken up by the liver. From the liver, the fat released from chylomicron remnants can be re-exported to the blood as the triglyceride component of very low - density lipoproteins. Very low - density lipoproteins are also subject to delipidation by vascular lipoprotein lipase, and deliver fats to tissues throughout the body. In particular, the released fatty acids can be stored in adipose cells as triglycerides. As triglycerides are lost from very low - density lipoproteins, the lipoprotein particles become smaller and denser ( since protein is denser than lipid ) and ultimately become low - density lipoproteins. A great deal has been written about low - density lipoproteins because they are thought to be atherogenic. Note that in contrast to any other route of absorption from the small intestine, the lymphatic system avoids first pass metabolism. Notes and references Jump up ^ Young, Barbara & Wheater, Paul, eds. ( 2006 ). Wheater 's functional histology : a text and colour atlas. Elsevier Health Sciences. p. 279. ISBN 978 - 0 - 443 - 06850 - 8. CS1 maint : Uses editors parameter ( link ) Jump up ^ Newsholme, Eric & Leech, Anthony ( 2009 ). Functional Biochemistry in Health and Disease. John Wiley & Sons. p. 79. ISBN 978 - 0 - 471 - 98820 - 5. CS1 maint : Uses authors parameter ( link ) Jump up ^ Montague, Susan E. et al, eds. ( 2005 ). Physiology for nursing practice. Elsevier. p. 502. ISBN 978 - 0 - 7020 - 2676 - 8. CS1 maint : Uses editors parameter ( link ) External links Histology image : 11705loa -- Histology Learning System at Boston University - `` 117. Digestive System : Alimentary Canal jejunum, central lacteals '' Biology portal Retrieved from `` https://en.wikipedia.org/w/index.php?title=Lacteal&oldid=835380586 '' Categories : Digestive system Lymphatic system Lymphatic tissue Hidden categories : Pages with unresolved properties CS1 maint : Uses editors parameter CS1 maint : Uses authors parameter Articles which use infobox templates with no data rows Talk About Wikipedia فارسی Français Italiano 日本 語 Edit links This page was last edited on 8 April 2018, at 10 : 27 ( UTC ). Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: where are lacteals located in the digestive tract
Answer: in the villi of the small intestine