Small Intestine Flashcards
1
Q
small intestine finishes…
A
chemical digestion and is site for most nutrient absorption
2
Q
duodenum
A
- C-shaped, ~10-12 inches long
- originates at pyloric sphincter
- receives bile to emulsify fats
- receives pancreatic secretions for digestion
3
Q
jejunum
A
- middle portion of small intestine
- primary region for chemical digestion and nutrient absorption
4
Q
ileum
A
- final segment of small intestine
- distal end terminates at ileocecal valve, a sphincter that controls the entry of materials into the large intestine
- absorbs nutrients in chyme
5
Q
circular folds (plicae circularis)
A
mucosal, submucosal tunics
6
Q
villi
A
microscopic fingerlike projections on surface of the circular folds
7
Q
microvilli
A
fingerlike projections on the surface of the villi (increase surface area = increase absorption)
