structure of ileum related to absorption Flashcards

1
Q

structrure of the ileum

A

wall of the ileum folded and posseses finger like projections about 1mm long called villi
they have thin walls lined with epithelial cells on the other side of which is a rich network of blood capilleries.
villi is situated between the lumen of the intestines and the blood and other tissues in the body.

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2
Q

structure related to function/ adaptations

A

-increase surface area for diffusion
-very thin walled so short diffsusion path
- contain muscle so are able to move helps to maintain concentration gradient as movement mixes elemnts of ileum
- supply of blood vessles (blood can carry away absorbed molecules ansd maintain a diffusion gradient)
- microvilli further increase surface area for absorption.

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