Question

Innominate is
A. A nerve and an artery
B. A nerve and a vein
C. A vein and an artery
D. A part of skeleton and an artery

Answer 1

Hint: Brachiocephalic artery is the first branch of the aortic arch that carries blood away from the heart.

Complete answer:
The innominate term is used in both the conditions of a skeletal system and circulatory system. In the skeletal system, it is known as a hip bone while in the circulatory system the innominate artery is known as the brachiocephalic trunk. In the circulatory system, the innominate artery is the largest branch of the arch of the aorta. It originates from the ascending portion of the aortic arch and appears as the first of the three great brachiocephalic arteries. These three arteries comprise the innominate artery, left common carotid artery, and left subclavian artery.
- The main branch is the innominate artery, which subsequently divides into the right subclavian artery and the right common carotid artery with an average distance of less than 1 cm from the aortic arch with the maximal distance being 2.5 cm
- The second branch is the left common carotid artery that has a common origin with the innominate artery.
- The last branch is the left subclavian artery that extends under the left collar bone and supplies the left upper extremity.

In the skeletal system, the innominate bone is also known as hip bones. These bones are fused bones that present in the pelvis either side of the sacrum. The bone includes the ischium, pubis, and ilium which are fused to each other in the acetabulum and makes the part of the appendicular skeleton.

So, the correct answer is ‘a part of skeleton and an artery’.

Note:
1. The pubic symphysis is the line where the two innominate bones articulate in the skeletal system.
2. The sacrum and the ilium bones of the pelvis joints at the sacroiliac joint, which are connected by strong ligaments.