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Encyclopedia > 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.
Dorlands/Elsevier l_01/12474659

A lacteal is a lymphatic capillary that absorbs dietary fats in the villi of the small intestine. Image File history File links No higher resolution available. ... Villus (Latin: shaggy hair[1], plural villi) can refer to: Intestinal villus. ... In anatomy, the intestine is the segment of the alimentary canal extending from the stomach to the anus and, in humans and other mammals, consists of two segments, the small intestine and the large intestine (or colon). ... ... In zootomy, epithelium is a tissue composed of a layer of cells. ... Goblet cells are glandular epithelial cells that are specifically designed to secrete mucus. ... White blood cells (also called leukocytes or immune cells) are a component of blood. ... The arterial system The blood vessels are part of the circulatory system and function to transport blood throughout the body. ... A top-down view of skeletal muscle Muscle (from Latin musculus little mouse [1]) is contractile tissue of the body and is derived from the mesodermal layer of embryonic germ cells. ... Image File history File links No higher resolution available. ... Elseviers logo. ... In mammals including humans, the lymphatic vessels (or lymphatics) are a network of thin tubes that branch, like blood vessels, into tissues throughout the body. ... In biology the small intestine is the part of the gastrointestinal tract (gut) between the stomach and the large intestine and includes the duodenum, jejunum, and the ileum. ...


The combination of fat and lymph in the lacteals is milky in appearance and called chyle. Individual lacteals merge to form larger lymphatic vessels that transport the fats to the thoracic duct which empties into the left subclavian vein. Chyle is a milky fluid (bodily fluid) consisting of lymph and emulsified fats, or free fatty acids (FFAs). ... In human anatomy, the thoracic duct is an important part of the lymphatic system — it is the largest lymphatic vessel in the body. ... The subclavian vein is a continuation of the axillary vein and runs from the outer border of the first rib to the medial border of anterior scalene muscle. ...


At this point, the fats are in the bloodstream. They can be converted to lipoproteins (HDL, LDL or VLDL) in the liver or be transported to tissues throughout the body and stored in adipose cells as triglycerides. A lipoprotein is a biochemical assembly that contains both proteins and lipids and may be structural or catalytic in function. ... The liver is an organ present in vertebrates and some other animals. ... Adipose tissue is an anatomical term for loose connective tissue composed of energy in the form of fat, although it also cushions and insulates the body. ... Triglyceride (blue: fatty acid; red: glycerol backbone) Triglycerides are glycerides in which the glycerol is esterified with three fatty acids. ...


See also

A lacteal is a lymphatic capillary that absorbs dietary fats in the villi of the small intestine. The combination of fat and lymph in the lacteals is milky in appearance and called chyle. Individual lacteals merge to form larger lymphatic vessels that transport the fats to the thoracic duct which empties into the right subclavian vein. At this point, the fats are in the bloodstream. They can be converted to lipoproteins (HDL, LDL or VLDL) in the liver or be transported to tissues throughout the body and stored in adipose cells as triglycerides. Villus (Latin: shaggy hair[1], plural villi) can refer to: Intestinal villus. ...


External links


  Results from FactBites:
 
XI. Splanchnology. 2g. The Small Intestine. Gray, Henry. 1918. Anatomy of the Human Body. (3484 words)
1059, 1060).—The essential parts of a villus are: the lacteal vessel, the bloodvessels, the epithelium, the basement membrane, and the muscular tissue of the mucosa, all being supported and held together by retiform lymphoid tissue.
The muscular fibers are derived from the muscularis mucosæ, and are arranged in longitudinal bundless around the lacteal vessel, extending from the base to the summit of the villus, and giving off, laterally, individual muscle cells, which are enclosed by the reticulum, and by it are attached to the basement-membrane and to the lacteal.
The lymphatics of the small intestine (lacteals) are arranged in two sets, those of the mucous membrane and those of the muscular coat.
MSN Encarta - Search Results - lacteal (136 words)
anatomy of lacteals, functions of lacteals, hormonal effects on lacteals
anatomy of lacteal glands, functions of lacteal glands, hormonal effects on lacteal glands
The corpus luteum is a structure in the ovary that develops at...
  More results at FactBites »


 

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