Digestive System II Histo Flashcards
sm intestine has large SA for absorption: ___ meters squared
200
sm intestine has long length, about __ in living, ___ in cadaver
10 ft; 21 ft
sm intestine has circular folds called plicae circularis that have a ____ core
submucosa
fingerlike projections of mucosa in the small intestine
villi
projections of apical membrane of intestinal absorptive cells; create a striated border
microvilli
the epithelium of the mucosa of the small intestine is _____; it contains ____ and ____
simple columnar epithelium; absorptive cells (enterocytes) and goblet cells
intestinal glands in the mucosa of the small intestine are called ____; they are ____ glands that have ___, ___, and ____ cells associated with them
crypts of Lieberkuhn; tubular; paneth cells, enteroendocrine cells, and stem cells
the submucosa in the duodenum has ____ or duodenal glands that produce ____
Brunner’s glands; alkaline mucous
the muscularis externa in the small intestine has 2 layers:
outer longitudinal
inner circular
in the ileum, groups of lymphatic nodules are present in the ____ and ____; these aggregated lymphatic follicles are referred to as ____
lamina propria; submucosa; Peyer’s patches
specialized epithelial cells in ileum overlying Peyer’s patches
M (microfold) cells
the epithelium in the mucosa of the large intestine is _____
simple columnar epithelium
the crypts of lierbkuhn (intestinal glands) in the large intestine have ____, ____, ____, and ____ cells associated with them
absorptive cells (colonocytes), goblet cells, enteroendocrine cells, and stem cells
the lamina propria of the large intestine has ____ cells and _____
lymphoid; lymphoid nodules
2 layers of muscularis externa in the large intestine
- inner circular layer
- outer longitudinal layer (teniae coli)