45 terms

abdominal viscera

parietal peritoneum
lining the internal surface of the abdominopelvic wall
visceral peritoneum
investing viscera (organs)
peritoneal cavity
a potential space, completely closed in males, in females uterine tubes open into the cavity
peritoneal fold that supports the viscera
enclosed by peritoneum and supported by a mesentary or ligament
retroperitoneal, not enclosed by peritoneum and lacking a mesentery or ligament
central regions of the abdomen
epigastric, umbilical, hypogastric
level of transpyloric plane
cuts through the tips of the 9th costal cartilage and the lower border of L-1
intertubercular plane
cuts the body at L-5
divisions of lumbar/aortic nodes
pre-aortic, lateral aortic, retro-aortic
divisions of pre-aortic nodes
coeliac, superior mesenteric, inferior mesenteric
efferents of the pre-aortic nodes
form the intestinal trunks, which enter cisterna chyli
cisterna chyli
elongated lymphatic sac, 5-6 cm long, continuous with thoracic duct
joins the cistera chyli
lumbar (right and left) and intestinal trunks
These organs pass through transpyloric plane
9th costal cartilage, pylorus of stomach, neck of pancreas, hili of the kidneys, duodenaljejunal junction, gall bladder (NPNHDG)
nerve supply to intestine
both sympathetic and parasympathetic
sympathetic nerve supply to foregut
celiac plexus - greater splanchnic nerve (T5-T9), lesser splanchnic nerve (T10-T11)
parasympathetic nerve supply to foregut
Vagus nerve (CN X)
sympathetic nerve supply to midgut
coeliac plexus and superior mesenteric plexus (T11-L1)
parasympathetic supply to midgut
Vagus, both systems distributed through superior mesenteric plexus
sympathetic supply to hindgut
Lumbar sympathetic chain (L1-L2)
parasympathetic supply to hindgut
pelvic splanchnic nerve - nerve originates (S-2,3,4) both thru hypogastric and inferior mesenteric plexus
parasympathetic action
motor to intestine and inhibitory to internal anal sphincter
sympathetic action
vascomotor, but also motor to internal anal sphincter
coeliac artery branches from this
abdominal aorta
celiac artery/trunk to foregut supplies what?
lower end of esophagus, stomach and upper part of duodenum up to the opening of the common bile duct, liver, spleen and greater part of pancreas
immediate branches of celiac artery
left gastric artery, splenic artery, common hepatic artery
branches of the left gastric artery
esophageal branches, left gastric artery
branches of common hepatic artery
proper hepatic (right and left), gastroduodenal (right gastroepiploic and superior pancreaticoduodenal), right gastric
branches of splenic artery
short gastric and left gastroepiploic arteries
blood supply to colon
branches from superior mesenteric and interior mesenteric artery
marginal artery
an arcade along the concavity of the colon, formed by anastomosis between the main arteries supplying the colon. Vasa recta arise from here
superior mesenteric artery
artery of the midgut, ventral branch of aorta, supplies all derivatives of midgut (lower part of duodenum, jejunum, ileum, appendix, cecum, ascending and transverse colon and lower half of pancreas
branches of superior mesenteric artery
inferior pancreaticoduodenal, jejunal, ileal, ileocolic, right colic, middle colic
superior mesenteric vein
drains blood from small intestine, appendix, cecum, ascending and transverse colon, terminates behind neck of pancreas by joining splenic vein to form portal vein
inferior mesenteric artery
ventral branch of aorta, arises behind third part of duodenum, artery of the hindgut, supplies descending colon, sigmoid colon, rectum, upper part of anal canal
branches of inferior mesenteric artery
left colic, sigmoid, superior rectal arteries
inferior mesenteric vein
drains blood from rectum, sigmoid colon, descending colon, terminates in the splenic vein
portal vein
drains blood from abdominal part of alimentary tract, gall bladder, pancreas, spleen and conveys it to the liver.
what happens to portal vein in the liver?
it breaks up into sinusoids which are drained by the hepatic veins to the inferior vena cava
formation of portal vein
union of sup. mesenteric vein and splenic vein behind neck of pancreas, about 8 cm long
termination of portal vein
at the porta hepatis by dividing in to right and left branches, which enters the liver
paired somatic brances of the abdominal aorta
inferior phrenic artery, 4 pairs of lumbar segmental arteries
unpaired visceral branches of the abdominal aorta
celiac trunk, superior and inferior mesenteric arteries
paired arteries to glands of the abdominal aorta
middle suprarenal, renal, gonadal arteries