GI Histology I Flashcards
what comes after the mucosa?
submucosa, muscularis externa, serosa OR adventitia
what makes up the lining mucosa?
lining epithelium, lamina propria, muscularis mucosa
what is the plexus found in the submucosa?
Meissner’s plexus
what plexus is found between the layers of muscle making up the muscularis externa (i.e., between the inner circular and the outer longitudinal layers of the muscularis externa)?
Auerbach’s Plexus (also termed the myenteric Plexus)
Peyer’s patches
A cluster of lymph nodes embedded in the small intestine (ileum specifically)
large folds in the stomach are called:
rugae
large folds in the small intestine are called:
plicae
small projections into the intestines:
villi
the esophagus is lined by a protective epithelium that is:
non-keratinized, stratified squamous
why is the base of the lining epithelium darker?
there is a lot of mitotic activity, producing daughter cells to produce those sloughed off
the first upper third of the esophagus is lined by ____ muscle
skeletal
the middle third of the esophagus is lined by ____ muscle
smooth and skeletal
the lower third of the esophagus is lined by ____ muscle
smooth
cardiac glands of the esophagus are found at:
the junction of the esophagus and the stomach, between the cricoid cartilage and the fifth tracheal ring
is skeletal muscle at the top of the esophagus under voluntary control? Why?
no, innervated by parasympathetics from the vagus