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Erstellt von Hannah Steele
vor mehr als 10 Jahre
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Food is digested so that molecules are small and soluble so that they can be absorbed
Most absorption happens in the small intestine
The small intestine is designed to allow the maximum absorption of food molecules It has a HUGE SURFACE AREA EXTENSIVE network of CAPILLARIES
Villus
Villus have Thin Walls have short diffusion distance Rich blood supply carries food molecules away to maintain a high concentration gradient for efficient diffusion
Active transport is also used for absorption
MITOCHONDRIA= site of energy release for active transport
The Villi are finger like projections in the lining of the small intestine which increase the surface area for diffusion.
Food molecules move from the small intestine into the bloodstream by diffusion and active transport
Digestive system and Villus
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