GI System Physiology Flashcards
What are 3 constrictions of oesophagus
Cervical
Thoracic
Diaphragmatic
Where does oesophagus pass through at diaphragm
Oesophageal hiatus
Acts as sphincter
How is oesophagus peritonised
Retroperitoneal
What part of stomach does oesophagus enter
Cardial orifice
What type of muscle is the oesophagus
Striated at top
Becomes smooth
What is the arterial supply
Left gastric - oesophageal branches
Celiac trunk
Left inferior phrenic
What is the venous drainage
Left gastric -> portal venous
Oesophageal -> azgous
What is the lymphatic drainage of the oesophagus
Left gastric
Celiac
What innervates the oesophagus
Vagus nere
Thoracic sympathetic
Splanchnic nerve
What are the parts of the stomach
Cardia - surrounds cardiac orifice (no sphincter)
Fundus - filled with gas at top related to left dome of diaphragm
Body
Pylorus - pyloric sphincter controlling discharge into duodenum
What is behind the shorter curvature
Lesser sac / omentum
What is surface anatomy of the liver
Ribs 7-11
Right side
What is produced in the liver and where does it go
Bile
Secreted into R and L hepatic ducts which go to gall bladder for storage
What happens during a meal to allow bile into duodenum
Gall bladder contracts
Bile travels out of cystic duct and joins with R and L hepatic to form common hepatic duct
Pancreatic duct containing bicarbonate and digestive enzymes joins
What is the artery of the gall bladder
Cystic artery
What is the triangle of clot
Triangle between common hepatic, cystic and visceral surface of liver
How is pancreas peritonised
Retroperitoneal
Where do pancreatic and bile duct open into
2nd part of duodenum at sphincter of oddi
What is behind the neck of the pancreas
Portal vein
Where is spleen found
Ribs 9-11 on L side
Intraperintoneal except hilum
What supplies spleen
Celiac trunk originating at T12 of aorta
What does celiac trunk divide into
Left gastric - lesser curvature of stomach
Hepatic - liver and gall bladder
Splenic - superior margin of pancreas
What makes up the midgut
Duodenum Jejunum Ileum Cecum Appendix Ascending colon Right half of transverse colon