Title: dig2 Flashcards | Quizlet
Headings: dig2
dig2
Terms in this set (62)

Content: ___ of nutrient absorption takes place in the small intestine. Three Sources of Digestive Enzymes in the Small Intestine
Mucosa of the Small Intestine
Pancreas
Liver (gallbladder)
Three Segments of the Small Intestine
Duodenum
Jejunum
Ileum
Duodenum
closest segment of the small intestine to the stomach; the 'mixing bowl' that receives the chyme from the stomach and digestive enzymes from the liver/pancreas; very few plicae circulares and villi are very small here; primary function is to receive chyme and neutralize its acids before damage can be done to absorptive surfaces
Jejunum
region that begins by a rather abrupt bend in the duodenum; bulk of chemical digestion and nutrient absorption takes place here; plicae circulares and villi are very prominent here (concentration declines as you proceed further down this tract)
Ileum
Final segment of the small intestine; distal portion lacks plicae circulares but does contain 20-30 masses of lymphoid tissue
Ileocecal Valve
sphincter that separates the ileum from the cecum of the large intestine; controls the flow of material into the cecum
Aggregated Lymphoid Nodules
the 20-30 masses of tissue in the distal portions of the ileum; protects the small intestine from bacteria that are normal inhabitants of the large intestine
Plicae Circulares
series of transverse folds within the small intestine that do not disappear when filling occurs;