The spleen Flashcards
(47 cards)
where is the spleen
lies against the diaphragm from ribs 9-11 on the left
its long axis lies along rib 10
describe the size of the spleen
The spleen is:
1 inch thick; 3 inches wide; 5 inches long; weighs 7oz (200g);
lies between the 9th and 11th ribs
what are the functions of the spleen
- Mechanical filtration of red blood cells
- Active immune response through humeral and cell mediated pathways
- Haematopoesis until 5th month of gestation
what are the relations of the renal area of the spleen (inf border)
left kidney
what is the relation of the gastric area of the spleen (sup border)
diaphragm and stomach
what is the relation of the colic area of the spleen (ant extremity)
colon-splenic flexure
where is the peritoneum surrounding the spleen derived from
the dorsal mesentery of the stomach
how is the stomach connected to the spleen
gastrosplenic ligament that carries the left gastroepiploic and short gastric branches of the splenic artery and veins
how is the spleen connected to the post abdo wall
by the lienorenal ligament that carries the splenic artery and vein alongside the tail of the pancreas
what might rib fractures adjacent to the spleen cause
rupture of the spleen causing intraperitoneal haemorrhage
what is the tail of the pancreas related to
splenorenal ligament containing the splenic artery and vein
what is the splenic artery a branch of
the largest branch of the coeliac artery
it runs along the upper border of the pancreas
it divides into six branches that enter the spleen at the hilum
where is the splenic vein
leaves the hilum and runs behind the tail and body of the pancreas
it joins the sup mesenteric vein to form the portal vein
where does lymph from the spleen drain to
along the course of the splenic artery and then to the coeliac nodes
what is the nerve supply to the spleen
derived from the coeliac plexus (t5-9)
what are the relations of the portal vein
bile duct coeliac trunk duodenum IVC aorta Inf mes. vein
where does the portal vein drain blood from
lower third of the oesophagus to halfway down the anal canal, spleen, pancreas and gallbladder
where is the portal vein
behind the neck of the pancreas by the union of the splenic and sup mesenteric veins
enters the lesser omentum
where is the SMV
anterior to the third part of the duodenum and uncinate process of the pancreas
describe the arrangement of vessels in the free edge of the lesser omentum
portal vein lies behind the hepatic artery with the bile duct to the right of the artery
what does the left gastric vein drain
lower oesophagus and left end of the lesser curve of the stomach to the portal vein
what does the cystic vein drain to
either to portal vein or liver
what does the right gastric vein drain
the right end of the lesser curve of the stomach directly to the portal vein
where are the portosystemic anastomoses
lower third of the oesophagus
halfway down the anal canal
paraumbilical veins
veins of the retroperitoneal colon, duodenum and pancreas and liver anastomose with the renal, lumbar and phrenic veins
