Lecture 44 - Carnivore Midgut Flashcards
what supplies the midgut with blood
cranial mesenteric a.
what organs are in the midgut
- descending duodenum
- transverse & ascending duodenum
- jejunum
- ileum
- cecum
- ascending colon
- transverse colon
T/F: there is not ventral mesentery in the midgut
TRUE
what is the root of the mesentery
mesojejunum + mesoileum (dorsal mesentery) around the cranial mesenteric a.
why are some bowels braced?
- rotation
- mesentery length
- connecting peritoneum
what vasculature supplies the transverse and ascending duodenum
pancreaticoduodenal a.
what are the 3 parts of the duodenum
- descending
- caudal duodenal flexure
- ascending
describe the organization of the jejunum
many bowel loops suspended by mesojejunum and freely moveable
describe the organization of the ileum
shortest segment of the intestine
what can be used to distinguish ileum from jejunum
- antimesenteric ileal a.
- ileocecal fold
what part of the large intestine sits to the right of the mesenteric root
- cecum
- ascending colon
what part of the large intestine sits to the left of the mesenteric root
descending colon
what part of the large intestine sits cranial to the mesenteric root
transverse colon
the apex of the cecum is connected to the ileum via the
ileocecal fold
T/F: the ileum and cecum directly communicate
FALSE
summarize growth and rotation of the midgut
- ventral herniation - rapid elongation, creates āuā-shaped midgut with cranial and caudal limb
- 90* rotation around the longitudinal axis (cranial to right and caudal to left)
- 180* rotation around the longitudinal axis
what connects the ascending duodenum to descending colon
duodenocolic fold
what are the branches of the cranial mesenteric a.
- caudal pancreaticoduodenal a
- common trunk
- middle colic a.
- right colic a.
- ileocolic a.
- jejunal a.
- ileal a.
what does the middle colic a. supply
- distal transverse colon
- left colic flexure
what does the right colic a. supply
- distal ascending colon
- right colic flexure
- proximal transverse colon
what does the ileocolic a. supply
- proximal ascending colon
- cecum
- ileum
what does the jejunal aa. supply
jejunum
what does the ileal aa. supply
proximal ileum
what are abdominal gutters
dorsally positioned left and right covered by parietal peritoneum ventrally and transversalis fascia dorsally
