Test 3- jejunum/ilium/colon

Question 1

where does the ileum end

Answer 1

at the ileocecal junction

Question 2

where does jejenum begin and what is it held in place by

Answer 2

begins at duodenal junction

held in place by mesentery

Question 3

atrial supply of jejenum and ileum

Answer 3

branches from superior mesenteric artery (right colic, middle colic and iliocolic arteries)

• Branches form arterial arcades
• -arcades lead to vasa recta
• –vasa recta lead to straight arteries

Question 4

venous drainage of jejunum and ileum

Answer 4

by superior mesenteric vein

joins w splenic vein to form hepatic porta;

Question 5

What are lacteals and where are they located

Answer 5

specialized lymphatic vessels in intestinal villi

absorb fat and fat soluble vit.

Question 6

Parasympathetic supply of small intestine

Answer 6

Vagus

Question 7

sympathetic supply of small intestine

Answer 7

greater spanchnic nerve and celiac plexus

lesser splanchnic nerve and superior mesenteric plexus

Question 8

Jejunum and ileum mixxed innervation

Answer 8

-superior mesenteric artery and branches served by the periarterial nerve plexus

Question 9

what are sensory fibres sensitive and insensitive to and where do the fibres synapse

Answer 9

insensitive- cutting/burning
sensitive- distention and transient ischemia

synapse in either the celiac or superior mesenteric gangla and then spinal cord

Question 10

4 features of large intestine

Answer 10

Teniae coli- thickend bands of longitudinal muscle
Haustra- pouches
omental appendices- small fatty appendices
caliber- large diameter

Question 11

Atrial supply of cecum and appendix

Answer 11

cecum- ileocolic artery

appendix- appendicular artery

Question 12

venous drainage of cecum and appendix

Answer 12

ileocolic vein–> superior mesenteric vein

Question 13

SNS and PNS of cecum and appendix

Answer 13

SNS- lesser splanchnic–> superior mesenteric plexus

PNS- Vagus nerves

Question 14

Arterial supply and venus drainage of ascending colon and right colic flexure

Answer 14

atrial- ileocolic and right colic arteries

drain- ileocolic and right colc veins–> superior mesenteric verin

Question 15

SNS and PNS of ascending colon and right colic flexure

Answer 15

SNS- lesser splanchnic nerve to superior mesenteric plexus

PNS- vagus nerve

Question 16

Atrial supply of transverse colon

Answer 16

1. middle colic artery

2. right and left colic arteries

Question 17

venous drainage of transverse colon

Answer 17

superior mesenteric vein

Question 18

SNS and PNS of transverse colon

Answer 18

SNS-superior mesenteric plexus

PNS- vagus nerve

Question 19

mixed innervation of transverse colon

Answer 19

some nerves from the superior mesenteric plexus and follow the right and middle colic arteries

Question 20

Arterial supply of descending and sigmoid colon

Answer 20

left colic and sigmoid arteries (which are branches of inferior mesenteric artery)

Question 21

What supplies collateral circulation in descending and sigmoid colon

Answer 21

marginal artery (ileocolic, right colic, middle colic, sigmoid artery, left colic)

Question 22

Venous drainage of descending colon

Answer 22

inferior mesenteric vein–> splecic vein–> heptic portal vein

Question 23

SNS and PNS of descending colon

Answer 23

SNS- lumbar splanchnic nerves–> inferior mesenteric ganglion

PNS- pelvic splanchnic nerves-> inferior hypogastric plexus

Question 24

Mixed innervation of descending

Answer 24

pariarterial plexus on the inferior mesenteric artery and its branches