GIT histology Flashcards
what are the 4 layers of the gut wall?
- mucosa
- submucosa
- muscularis externa
- adventitia/serosa
where is the myenteric plexus found?
between the inner circular and outer longitudinal smooth muscle layers (in the muscularis externa layer of gut wall)
what are the 3 components of the mucosal layer?
- epithelium
- lamina propria
- muscularis mucosae
what cells in the stomach have a foamy like appearance?
mucus cells
what cells in the stomach have a fried egg appearance?
parietal cells (secrete HCl and intrinsic factor)
what are the layers of smooth muscle in stomach?
longitudinal, circular, oblique
what type of epithelium lines the stomach wall?
simple columnar epithelium
what type of epithelium lines the oesophagus?
stratified squamous epithelium
where are crypts of Lieberkuhn found?
small intestine and large intestine
what does crypts of Lieberkuhn contain?
stem cells that differentiate into epithelial cells
what are Brunner’s glands and where are they found?
function: secrete alkaline mucus
location: found in the submucosa of the duodenum
what are plicae circulares?
folds of submucosa of small intestine to maximise SA/V ratio for absorption
what are peyer’s patches and where are they found?
aggregates of lymphoid tissue found in submucosa of ileum
what are specialised macrophages in the liver called?
kupffer cells
what is the space disse?
space between endothelial cells and hepatocytes in liver
