Large Intestine Physiology Harvey Davies & Sean Botham Peer Support.
Anatomy – Foregut, Midgut, Hindgut Sean Botham Chris Harper.
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Transcript of Anatomy – Foregut, Midgut, Hindgut Sean Botham Chris Harper.
BoundariesForegut:
Mouth Major duodenal papillae (2nd part of duodenum).
Blood supply – Coeliac Trunk (T12)
Midgut:
Major duodenal pailliae 2/3rds along transverse colon.
Blood supply – Superior mesenteric artery (L1)
Hindgut:
2/3rds long transverse colon Upper anal canal
Blood supply – Inferior mesenteric artery (L3)
Intraperitoneal or Retroperitoneal?
Intra – SALTD SPRSS Retro – SAD PUCKER
StomachAppendixLiverTransverse ColonDuodenum (1st part)Small intestinePancreas (tail only)Sigmoid colonSpleen
Suprarenal glandsAorta & IVCDuodenum (parts 2, 3 and 4)Pancreas (all but the tail)Ureter & BladderColon (Ascending and Descending)KidneysEsophagusRectum (lower 2/3rds)
Secondary Retro – Pussy Cat Dolls
Pancreas, Colon (Ascending and Descending), Duodenum (parts 2, 3 and 4).
Foregut Blood Supply
Left gastric
Left gastroepiploic
Short gastric
Right gastroepiploic
Right gastric
Gastroduodenal
Oesophageal branches
Splenic artery Common hepatic
CT
Superior pancreaticoduodenal
Midgut Blood Supply
Inferior Pancreatico-duodenal
Jejunal
IlealIle
ocolic
Right colic
Middle colic
Marginal artery
Appendicular
SMA (L1)
Hindgut Blood Supply
Superior m
esenteric arte
ry Inferio
r mesen
teric artery
Left colic
Sigmoid
Superior rectal (top part of rectum)
Internal iliac artery(bottom part of rectum)
Lower Oesophagus
Foregut
Major Duodenal Papilla
Midgut
2/3rds along Transverse Colon
Hindgut
Upper Anal Canal
Blood Supply:
Coeliac Trunk
Superior Mesenteric Artery
Inferior Mesenteric Artery
Organs: •Oesophagus•Spleen•Stomach•Liver•Gall Bladder•Pancreas•1st and 2nd part of Duodenum
•3rd and 4th part of Duodenum•Jejunum•Ileum•Appendix•Ascending Colon•Caecum•Proximal 2/3 of Transverse Colon
•Distal 1/3 of Transverse Colon•Descending Colon•Sigmoid Colon•Rectum•Upper Anal Canal•Urogenital Sinus
Organs of the GI Tract
Pain Referral of the GI Tract
Region Epigastric
Spinal Level T5-9
Organs Referring Pain
Oesophagus, Spleen, Stomach, Liver, Gall Bladder, Pancreas, 1st and 2nd part of Duodenum
Organs Derived From
Foregut
Region Umbilical
Spinal Level T10-T11
Organs Referring Pain
3rd and 4th part of Duodenum, Jejunum, Ileum, Appendix, Ascending Colon, Caecum, Proximal 2/3 of Transverse Colon
Derived From Midgut
Region Pubic
Spinal Level T12-L1
Organs Referring Pain
Distal 1/3 of Transverse Colon, Descending Colon, Sigmoid Colon, Rectum, Upper Anal Canal, Urogenital Sinus
Derived From Hindgut
Referred pain: Pain felt at a site other than where the cause is situated. Pain in internal organs is often referred to sites distant from them. Referred pain is related to innervations of organs by
afferent pain fibres which follow similar paths as the sympathetic nervous system.