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What is absorption?
The movement of digested, soluble food molecules into the bloodstream.
Where does absorption take place?
In the small intestine.
What are villi?
Finger-like projections lining the small intestine.
Why do villi increase the rate of absorption?
They increase the surface area.
What is the function of the capillaries in a villus?
To absorb glucose and amino acids into the blood.
What is the function of the lacteal in a villus?
To absorb fatty acids and glycerol into the lymphatic system.
How is the small intestine adapted for absorption?
It has a large surface area, a thin wall and a good blood supply.
Draw and label a villus
Villus, capillaries, lacteal, thin epithelium.