pathology of colon Flashcards
length of small bowel
~6m
3 parts of SI?
duodenum
jejunum
ileum
6 parts of large bowel?
caecum ascending colon transverse colon descending colon sigmoid colon rectum
how is ascending colon peritonised?
retro
how is descending colon peritonised?
retro
how is rectum peritonised?
outside of peritoneal cavity - extraperitoneal
length of rectum?
15cm
LB - stem cell turnover?
~1 week
LB - surface?
columnar absorptive cells
no villi therefore flat
crypts in LB?
long tubular crypts
faeces before and after LB?
before - wet and not solid
after - dry and solid
SB - 3 types of cells?
goblet cells
columnar absorptive cells
endocrine cells
SB - villi?
present on surface
SB - location of nerves and vessels?
submucosa
SB and LB - intrinsic mechanism for peristalsis?
myenteric plexus
SB and LB - extrinsic mechanism for peristalsis?
autonomic innervation
meissener’s plexus?
base of the submucosa
Auerbach plexus?
between inner circular and outer longitudinal layers of muscular propria
