Session 12 - The Small and Large Intestine

Question 1

Which vein drains blood from the colon and where does it flow to?

Answer 1

Superior mesenteric vein drains blood from the midgut part of the large intestine (as far as 2/3 way along transverse colon)

The inferior mesenteric vein drains the hindgut part of the large intestine.

Question 2

The inferior mesenteric vein enters into the ?

Answer 2

Splenic vein

Question 3

Where does lymph from the small bowel drain?

Answer 3

Into the cisterna chyli and then into the thoracic duct.

Question 4

Which foodstuffs are absorbed through the lymphatic system?

Answer 4

Lipids

Question 5

What 4 anatomical features ensure the small bowel has a high surface area for
absorption of nutrients?

Answer 5

● Length
● Mucosal folds (plicae circulares)
● Villi
● Microvilli.

Question 6

Where is the junction between the midgut and the hindgut?

Answer 6

2/3 of the way along the transverse colon.

Question 7

How do you distinguish a loop of large intestine from that of small intestine?

Answer 7

● Large intestine has appendices epiploicae, haustrations and teniae coli.
● The small intestine is centrally located, whilst the colon lies peripherally

Question 8

Which part of the bowel is supplied by sacral nerves 2, 3 and 4?

Answer 8

The Hindgut