histology Flashcards
what change in epithelium is there at the gastro-oesophageal junction
stratified squamous of oesophagus to columnar of cardia of stomach
what are at the bottom of gastric pits
gastric glands
what are gastric pits lined by
surface mucous cells
cells of the gastric gland - isthmus
parietal cells
cells of the gastric gland - neck
mucous neck cells
cells of the gastric gland - base
chief cells, with some parietal and enteroendocrine (neruroendocrine)
cardia pits
deep pits that branch into loosely packed tortuous glands
body pits
shallow gastric pits with long straight glands
pyloric pits
deep gastric pits with branched and coiled gastric glands t higher density than in the cardia.
what is special about the muscularis externa of the stomach
contains an extra layer that lies oblique to the longitudinal and circular layers
it is located internal to the circular layer and aids in the churning action of the stomach
in the small intestine what is found between the villi
crypt of Lieberkuhn
how long is the duodenum
25cm
how long is the jejunum
2m
how long is the ileum
2.75
what glands does the duodenum contain
Brunner
what are found at the base of the crypts of Lieberkuhn
paneth cells and stem cells
paneth cell function
defensive function and a role in regulating bacterial flora
enteroendocrine cell function
produce hormones that contribute tot he controls of secretion and motility e.g. gastrin and CCK
what are the enterocytes of the small intestine made of
simple columnar epithelium with brush border
what do brunners glands do
in the presence of chyme secret a thin alkaline mucous to neutralise chyme
what do the villi in the jejunum haev
plicae circularis
what lymphoid tissues are found in the ileum
Peyers patches
in the large intestine how is the outer longitudinal muscle found
in 3 stripes called teniae coli
what happens to the appendix with age
lymphoid tissue declines
what is the anal canal made from
stratified squamous
