Question
The blood vessel marked in the picture below is a branch of the inferior mesenteric artery. Where does the venous counterpart of the marked vessel drain into?
| A. |
Inferior mesenteric vein
|
| B. |
External iliac vein
|
| C. |
Internal iliac vein
|
| D. |
Internal pudendal vein
|
Show Answer
|
Correct Answer � A
Explanation
|
|
Option A: Inferior mesenteric vein
- The marked blood vessel is a superior rectal artery, a branch of the inferior mesenteric artery. The counterpart is the superior rectal vein that drains into the Inferior mesenteric vein. The inferior mesenteric vein drains the descending colon via the left colic vein, the sigmoid colon via the sigmoid vein, and the rectum via the superior rectal vein.
- The inferior mesenteric vein joins the splenic vein and combines the superior mesenteric vein, which then continues as the portal vein.
- The superior rectal artery supplies the upper half, and the inferior rectal artery supplies the lower half.
- The superior rectal vein drains the upper half into the inferior mesenteric vein.
- The inferior rectal vein drains the lower half into the internal pudendal vein.
Option B: External iliac vein
- External iliac vein connects femoral vein to the common iliac vein
- There origin is at the inferior margin of the inguinal ligament.
Option C: Internal iliac vein
- Internal iliac vein join with external iliac vein to form common iliac vein.
Option D: Internal pudendal vein
- Internal pudendal vein it drains to the internal iliac vein .
- It accompany the internal pudendal artery.
