13. Veins of Rectum and Anal Canal

Question 1

Identify 1 - 2

Answer 1

1. Common iliac veins
2. Median sacral vein

Question 2

Identify 12

Answer 2

12. Superior rectal vein (bifurcation)

Question 3

Identify 3 - 4

Answer 3

3. External rectal plexus
4. Internal rectal plexus

Question 4

Identify 5 - 6

Answer 4

5. Inferior rectal vein
6. Internal pudendal vein (in pudendal [Alcock’s] canal)

Question 5

Identify 7 - 8

Answer 5

7. Internal pudendal vein
8. Middle rectal vein

Question 6

Identify 9

Answer 6

9. Superior vesical and uterine veins

Question 7

Identify 10 - 11

Answer 7

10. Internal iliac vein
11. External iliac vein

Question 8

The veins draining blood from the rectum and anal canal comprise 3 sets of veins

→ What are they?

Answer 8

1. inferior rectal veins from the internal pudendal vein (caval system)
2. middle rectal veins from the internal iliac vein (caval system)
3. the superior rectal vein from the inferior mesenteric vein (portal system).

Question 9

The veins draining blood from the rectum and anal canal comprise 3 sets of veins

1. inferior rectal veins from ____
2. middle rectal veins from ___
3. the superior rectal vein from ____

Answer 9

1. the internal pudendal vein (caval system)
2. the internal iliac vein (caval system)
3. the inferior mesenteric vein (portal system)

Question 10

The veins draining blood from the rectum and anal canal comprise 3 sets of veins

1. ___ from the internal pudendal vein (caval system)
2. _____ from the internal iliac vein (caval system)
3. ____ from the inferior mesenteric vein (portal system).

Answer 10

inferior rectal veins

middle rectal veins

the superior rectal vein

Question 11

The veins draining blood from the rectum and anal canal comprise 3 sets of veins.

1. inferior rectal veins from the internal pudendal vein (____)
2. middle rectal veins from the internal iliac vein (____)
3. the superior rectal vein from the inferior mesenteric vein (____).

→ Name the systems

Answer 11

1. caval system
2. caval system
3. portal system

Question 12

The veins draining blood from the rectum and anal canal comprise 3 sets of veins

→ These valveless veins provide an important (1)____ around the rectum should the venous return by the (2)____ be impeded.

Answer 12

1. portacaval anastomosis
2. portal or caval system

Question 13

The veins draining blood from the rectum and anal canal comprise 3 sets of veins

→ These valveless veins provide an important portacaval anastomosis around (1)____ should the venous return by the portal or caval system be impeded.

Answer 13

the rectum

Question 14

the extensive anastomoses between the venous tributaries in the walls of the __ (2 structures)

Answer 14

anal canal and rectum.