Lymfe transporter fedt absorberet fra tyndtarmen til vena cava?
Lymphatic system
Lymfekar kaldet laktalkanaler findes i begyndelsen af mave-tarmkanalen, hovedsageligt i tyndtarmen. Mens de fleste andre næringsstoffer, der absorberes af tyndtarmen, sendes videre til portvenesystemet for at blive drænet via portvenen til leveren til forarbejdning, sendes fedtstoffer (lipider) videre til lymfesystemet for at blive transporteret til blodcirkulationen via thorakalgangen. (Der er undtagelser, f.eks. er mellemkædede triglycerider fedtsyreestere af glycerol, som passivt diffunderer fra GI-kanalen til portalsystemet). Den berigede lymfe, der har sit udspring i tyndtarmens lymfekar, kaldes chyle. De næringsstoffer, der frigives til kredsløbssystemet, behandles af leveren efter at have passeret gennem det systemiske kredsløb.
Lymphatic system
Lymph vessels called lacteals are in the beginning of the gastrointestinal tract, predominantly in the small intestine. While most other nutrients absorbed by the small intestine are passed on to the portal venous system to drain via the portal vein into the liver for processing, fats (lipids) are passed on to the lymphatic system to be transported to the blood circulation via the thoracic duct. (There are exceptions, for example medium-chain triglycerides are fatty acid esters of glycerol that passively diffuse from the GI tract to the portal system.) The enriched lymph originating in the lymphatics of the small intestine is called chyle. The nutrients that are released to the circulatory system are processed by the liver, having passed through the systemic circulation.
Lymphatic system