Internal pudendal artery is a branch of –
**Core Concept**
The internal pudendal artery is a vital blood vessel supplying the external genitalia and perineum. It originates from the anterior division of the internal iliac artery, which is a major branch of the common iliac artery.
**Why the Correct Answer is Right**
The internal pudendal artery arises from the anterior division of the internal iliac artery, which is responsible for supplying blood to the pelvic wall, pelvic viscera, and external genitalia. This artery then bifurcates into the inferior rectal artery and the internal pudendal artery proper, which supplies the external genitalia, including the penis and clitoris, as well as the perineal skin and muscles. The internal pudendal artery plays a crucial role in maintaining the blood supply to these sensitive areas.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the origin of the internal pudendal artery. The internal carotid artery is a separate artery that arises from the common carotid artery and supplies the brain and face.
**Option B:** The iliolumbar artery is a branch of the common iliac artery, but it is not directly involved in the origin of the internal pudendal artery.
**Option C:** The obturator artery is a branch of the external iliac artery, which is not the correct origin of the internal pudendal artery.
**Clinical Pearl / High-Yield Fact**
The internal pudendal artery is a key artery to identify during pelvic surgery, as damage to this artery can lead to significant bleeding and potentially life-threatening complications.
**Correct Answer:** A. Internal iliac artery.