digestive system appendix- rectum and clinical Flashcards
what is the surface epithelium of the appendix?
simple columnar
is there a lamina propria in the appendix?
yes
describe the muscularis mucosae of the appendix?
poorly developed
the appendix has what type of crypts?
short crypts
does the appendix have villi or paneth cells?
no
describe the submucosa of the appendix
thick layer with larger blood vessels and numerous lymph nodules
does the appendix contain serosa or adventitia?
serosa
what is the ME of appendix like?
normal pattern but thin
what are the 2 functions of the appendix
humoral immunity
reservoir for good bacteria
what is the surface epithelium of the colon?
simple columnar
describe the lamina propria of the colon?
typical and has intestinal glands (crypts)
colonocytes
describe the MM of the colon?
typical
what does the mucosa of the colon lack?
villi
paneth cells
describe the muscularis externa of the colon
outer longitudinal muscle is gathered into bands called teniae coli and is continuous
constant tonus of tenaie coli results in sacculations called?
haustra
what part of the colon is adventitia?
ascending and descending colon
what part of the colon is serosa?
transverse and sigmoid colon
does the appendix have villi?
no
what layer is found covering the muscularis externa of the transverse colon?
serosa
what layer is found covering the descending colon?
adventitia
what do you call the outer longitudinal layer in the colon?
tenaie coli
what makes up the tenaie coli?
haustra
what is the surface epithelium of the rectum?
simple columnar
what are the 3 notable features that make the rectum different from the colon?
transverse rectal folds
no tenaie coli in ME
luminal wall covering include adventitia