Large intestine: Arterial Supply, lymphatic drainage & Nerve supply

Question 1

Parts of Colon derived from Midgut are supplied by Arterial branches of

Answer 1

Superior Mesenteric A

Question 2

Superior Mesenteric A branches supplying Colon (midgut)

Answer 2

• IleoColic A
• Right Colic A
• Middle Colic A

Question 3

Parts of Colon derived from hindgut are supplied by Arterial branches of

Answer 3

Inferior Mesenteric Artery

Question 4

Branches of Inferior Mesenteric Artery Supplying Colon (Hindgut)

Answer 4

Superior & inferior left Colic Arteries

Inferior Left colic Becomes Sigmoid A

Question 5

Surgical Importance Of Marginal A of durmmond

Answer 5

• It connects all Arteries, thus creating channels between Superior & inferior mesenteric As, it also give direct branches to colon (vasa recta)
• Therefore it can maintain** Viability **of Long segments of Colon after division of major Colic Branches
• this allows for possibilty of Colon bypass surgery

Question 6

Lymph nodes Receiving drainages of Colon

Answer 6

• Epicolic LN: on wall of bowel
• Paracolic LN: between Marginal A and bowel
• Intermediate nodes: along Colic Arteries
• Central Nodes: along superior & inferior mesenteric Arteries

Question 7

Parasympathetic Nerve supply of Colon

Answer 7

divided into 2 groups:
* Caecum, ascending & right 2/3 of transverse Colon= Vagus N
* Left 1/3 transverse Colon, descending & Sigmoid Colon= Pelvic Splanchnic N (Nervi erigente) from S2,3,4

Question 8

Sympathetic Nerve supply of Colon

Answer 8

Greater & lesser Splanchnic Nerves
(supplying Symp. to BV)