Anatomy 3 Flashcards
what are the 2 branches of the right colic artery?
descending and an ascending branch
what are the 2 branches of the ileocolic artery?
caecal and appendicular branches.
what is the large intestine supplied by?
branches of the superior mesenteric artery
what is the right colic flexure also known as?
hepatic flexure
what does colic mean?
to do with the colon (large intestine)
what is the role of the marginal artery? why is it of clinical importance?
provides collateral supply to the colon
Important because it maintains arterial supply in the case of occlusion or stenosis of one of the major vessels.
what arise from the marginal artery to supply the colon?
Long, straight arterial branches (called vasa recta)
what does the marginal artery form from?
Forms from the anastomoses (arterial arcade)
what is meckel’s diverticulum? how common is it?
a congenital outpouching or bulge in the lower part of the small intestine. It is a leftover of the umbilical cord.
in 2% of population
what can inflammation of meckel’s diverticulum be confused for?
appendicitis
where is meckel’s diverticulum found? and how long is it?
2 feet from the ileocecal junction
It is 5cm long
how long is the jejunum?
roughly 2.5 m
what is mesentery? what is it formed from?
an organ that attaches the intestines to the posterior abdominal wall in humans and is formed by the double fold of peritoneum
what shape is sigmoid colon?
s shaped
what is the mesentery of transverse colon called?
transverse mesocolon
what does meso- mean?
held by fold of peritoneum
what parts of the large intestine are retroperitoneal?
ascending and descending
list the features of the large intestine compared to small intestine
larger lumen than SI
haustrations/sacculations - bulges
appendices epiploicae - fatty tags which hang from colon and are covered by peritoneum
taenia coli - bands of thickened smooth muscle
how is a retrocaecal appendix found in surgery?
identified by three Taenia coli which diverge at the appendix
what is a paracolic gutter?
recesses between the abdominal wall and the colon.
