Abdominal organs - foregut, midgut, hindgut Flashcards
Small intestine (parts)
Duodenum
Jejunum
Ileum
(DJ Ileum)
Large intestine (parts)
Caecum Appendix Ascending colon Transverse colon Descending colon Sigmoid colon Rectum Anal canal Anus
Foregut organs
Oesophagus to mid duodenum Liver GB Spleen 1/2 pancreas
Foregut Pain region
Epigastric region
Foregut structures enter the spinal cord at level
T6-T9
Foregut blood supply
Coeliac trunk
- first of the 3 midline branches of the AA
- arises around T12
- branches into: splenic artery, left gastric artery, common hepatic artery (which then gives off gastroduodenal artery and becomes hepatic artery proper)
Foregut venous drainage
Splenic vein
- then drains to HPV
Midgut organs
Mid duodenum to proximal 2/3 of transverse colon
1/2 pancreas
Midgut Pain region
Umbilical region
Midgut structures enter the spinal cord at level
T8-T12
Midgut blood supply
SMA (superior mesenteric artery) Arises around L1 - ileocolic artery - right colic artery - middle colic artery - inferior pancreatico-duodenal artery
Midgut venous drainage
SMV
- then drains to HPV
Hindgut organs
Distal 2/3 transverse colon to proximal 1/2 of anal canal
Hindgut Pain region
Pubic region
Hindgut structures enter the spinal cord at level
T10-L2
Hindgut blood supply
IMA (inferior mesenteric artery) Arises around L3 - left colic artery - sigmoid colic artery - superior rectal artery
Hindgut venous drainage
IMV
- drains to splenic vein
- then drains to HPV
After the hindgut, the remainder of the GI tract is supplied by?
Internal iliac artery
Marginal artery of drummond
Arterial anastomoses between SMA and IMA
This helps to prevent intestinal ischaemia by providing an alternative route which blood can travel
Lymphatics of the abdomen
Coeliac lymph vessels
SM lymph vessels
IM lymph vessels
Lateral branches of the abdominal aorta
Adrenal glands - L1
Gonadal artery - L2
Common iliac’s bifurcation
L4 level
Bifurcate into internal and external iliac
