Also called villi. They are short, thin hair-like projections that grow densely on the intestinal mucosa (small intestine) and chorion of vertebrates, and spread out in a finger-like or tree-like shape. This significantly increases the surface area, allowing for efficient absorption. They are covered with villous epithelium, and underneath that is a capillary network. Source : Heibonsha Encyclopedia About MyPedia Information |
柔突起とも。脊椎動物の腸粘膜(小腸)や,絨毛膜などに密生している,毛のように細く短い小突起で,指状ないし樹状に広がる。これによって表面積は著しく増大し,効率よく吸収ができる。絨毛上皮でおおわれ,その下には毛細血管網がある。
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