- Three features increase surface area: 1. the lining is folded. 2. multicelled, fingerlike absorptive structures (villi) with lymph and blood vessels extend from folds. 3. brush border cells on the villus surface have membrane extensions (microvilli) that project into the lumen.Two main structures in the small intestinal mucosa: 1. Villi (絨毛): 1) enterocytes (ie. brush border cells, 90%, 主司吸收) 2) Goblet cells (杯狀細胞,主司黏液分泌) 2. Crypts of Lieberkuhn (腸腺): 1) stem cells (幹細胞,主司腸道各種表皮細胞的再生) 2) Paneth cells (主司對腸道微生物的免疫防禦) 3) signaling cells (主司分泌 secretin, cholecystokinin (CCK), gastric inhibitory protein (GIP), motilin)
- Three features increase surface area: 1. the lining is folded. 2. multicelled, fingerlike absorptive structures (villi) with lymph and blood vessels extend from folds. 3. brush border cells on the villus surface have membrane extensions (microvilli) that project into the lumen.<br>Two main structures in the small intestinal mucosa: 1. Villi (絨毛): 1) enterocytes (ie. brush border cells, 90%, 主司吸收) 2) Goblet cells (杯狀細胞,主司黏液分泌) 2. Crypts of Lieberkuhn (腸腺): 1) stem cells (幹細胞,主司腸道各種表皮細胞的再生) 2) Paneth cells (主司對腸道微生物的免疫防禦) 3) signaling cells (主司分泌 secretin, cholecystokinin (CCK), gastric inhibitory protein (GIP), motilin)
正在翻譯中..
