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- Q2967754 subject Q13269744.
- Q2967754 subject Q6272142.
- Q2967754 subject Q6584939.
- Q2967754 abstract "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 and monoglycerides. These then pass from the intestinal lumen into the enterocyte, where they are re-esterified to form triacylglycerol. The triacylglycerol 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, also subject to delipidation by vascular lipoprotein lipase, delivers fats to tissues throughout the body and, 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 particle becomes smaller and denser (since protein is denser than lipid) and ultimately becomes low-density lipoproteins. A great deal has been written about low-density lipoproteins because it is 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.".
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- Q2967754 thumbnail Gray1060.png?width=300.
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- Q2967754 name "Lacteal".
- Q2967754 type AnatomicalStructure.
- Q2967754 type Thing.
- Q2967754 type Q4936952.
- Q2967754 comment "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 and monoglycerides. These then pass from the intestinal lumen into the enterocyte, where they are re-esterified to form triacylglycerol. The triacylglycerol is then combined with phospholipids, cholesterol ester, and apolipoprotein B48 to form chylomicrons.".
- Q2967754 label "Lacteal".
- Q2967754 depiction Gray1060.png.
- Q2967754 name "Lacteal".