Session 8 - Anatomy of the intestines

Question 1

ADD TABLE

Answer 1

a

Question 2

Where is the jejunum found? Where does it begin, what course does it take and where does the ileum end?

Answer 2

The jejunum is the second part of the small intestine, beginning at the duodenojejunal flexure where the digestive tract resumes an intraperitoneal course. The third part of the small intestine, the ileum, ends at the ileocaecal junction.

Question 3

How long are the jejunum and ileum together?

Answer 3

6-7 metres

Question 4

In fifths how long are the jejunum and ileum in comparison to one another

Answer 4

Jejunum - 2/5 Ileum - 3/5

Question 5

Where does the jejunum mostly lie?

Answer 5

Left Upper Quadrant

Question 6

Where does the Ileum mostly lie?

Answer 6

Right Lower Quadrant

Question 7

Answer 7

Question 8

Answer 8

Question 9

Outline the arterial and venous supply of the duodenum (Remember separate into proximal and distal)

Answer 9

Arterial supply o Proximal to bile duct • Coeliac trunk -> Common hepatic artery -> Gastroduodenal artery -> Superior pancreaticoduodenal o Distal to bile duct • Superior mesenteric artery -> Inferior pancreatico duodenal Venous supply o Hepatic portal vein o Superior mesenteric vein o Splenic vein

Question 10

Outline the arterial and venous supply of the jejunum and ileum

Answer 10

Arterial supply o Superior Mesenteric Artery -> Jejunal artery o Superior Mesenteric Artery -> Ileal artery Venous supply Superior Mesenteric Vein

Question 11

Outline the arterial and venous supply of the o Caecum and Appendix

Answer 11

o Abdominal Aorta -> SMA -> Ileocolic o Abdominal Aorta -> SMA -> Ilecolic -> Appendicular Venous supply Ileocolic vein

Question 12

Outline the arterial and venous supply of the Ascending Colon, Right Colic Flexure

Answer 12

Arterial supply o SMA -> Ileocolic o SMA -> Right colic Anastamose with each other to form series of anastamotic arcades that together form MARGINAL ARTERY Venous drainage o Ileocolic vein o Right colic vein

Question 13

Outline the arterial and venous supply of the Transverse Colon

Answer 13

Arterial supply o SMA -> Middle colic o SMA -> Right colic o IMA -> Left colic Venous drainage o Middle colic vein

Question 14

Outline the arterial and venous supply of the Descending and Sigmoid Colon

Answer 14

Arterial supply o IMA -> Left Colic o IMA -> Sigmoid Venous drainage o Left colic o Sigmoid vein

Question 15

Outline the arterial and venous supply of the Rectum

Answer 15

Arterial supply o IMA -> Superior Rectal -> R+L superior branch o Common iliac -> R+L Internal iliac -> R+L middle rectal o Common illiac -> R+L Internal Iliac -> Inferior Pudendal -> R+L inferior rectal Venous drainage o Superior, middle and inferior rectal veins o Superior drains into IMV, splenic and then portal o Middle and inferior drain into systemic

Question 16

Outline the arterial and venous supply of the Anal canal

Answer 16

Arterial supply o Superior rectal artery above pectinate line o Inferior rectal arteries below pectinate line Venous Drainage external hemorrhoidal plexus of veins

Question 17

What do the anastamosing loops of the superior and inferior mesenteric arteries form?

Answer 17

arterial arcades

Question 18

What is the location of the paracolic gutters Separate description for RIGHT and LEFT

Answer 18

o A deep vertical groove lined with parietal peritoneum, the Right Paracolic Gutter, lies between the lateral aspect of the ascending colon and the adjacent abdominal wall. o As with the ascending colon, a deep vertical groove lined with parietal peritoneum, the Left Paracolic Gutter, lies between the lateral aspect of the ascending colon and the adjacent abdominal wall.

Question 19

Where can the retro-vesicle pouch be found in males?

Answer 19

In males, after the second third of the rectum, the peritoneum reflects onto the posterior wall of the bladder, forming the floor of the rectovesical pouch.

Question 20

Where can the rectouterine pouch be found?

Answer 20

In females, after the second third of the rectum, the peritoneum reflects onto the posterior part of the fornix of the Vagina, forming the floor of the rectouterine pouch.

Question 21

Vesicouterine Pouch

Answer 21

The peritoneal reflection in females between the Uterus and Urinary Bladder