Question

Identify the organ ( structure) or vessels in which the arteries directly arise from and give rise to Ascending aorta Coronary arteries Aoetic arch Brachiocephaluc artery Right common Right common carotid artery Right subclavian artery Left common carotid artery Left subclavian artery Thoracic aorta Abdominal aorta Internal carotid artery External carotid artery Axillary artery Brachial artery Radial artery Ulnar artery Superficial palmar Digital artery Intetnal thoracic artery Anterior intercostal artery

Answer 1

The aorta is the largest artery in the body which begins at the top of the left ventricle in the heart. The ascending aorta arises from the aortic orifice from the left ventricle. The left and right aortic sinuses in the ascending aorta which are located at the level of the aortic valve gives rise to the left and right coronary arteries. The aortic arch is a continuation of the ascending aorta and arises at the level of the second sternocostal joint.

Brachiocephalic trunk, Left common carotid artery, Left subclavian artery arises from the aortic arch proximal to distal where the Brachiocephalic trunk is the first and largest branch which ascends laterally to split into the right common carotid (occur at the level of the right sternoclavicular joint) and right subclavian arteries (another branch).

The thoracic aorta is the descending aorta which continues from the aortic arch, initially beginning from the left of the vertebral column and approaches the midline as it descends. It leaves the thorax via the aortic hiatus in the diaphragm and becomes the abdominal aorta.

The carotid arteries split into the external and internal carotid arteries, the bifurcation occurs in an area known as the carotid triangle. When the subclavian arteries cross the lateral edge of the 1st rib, entering the axilla, they are called axillary arteries. The axillary artery becomes the brachial artery at the level of the teres major muscle. The brachial artery bifurcates into the radial artery and the ulnar artery, in the distal region of the cubital fossa. In the hand, the ulnar artery divides into two branches, the superficial palmar arch, and the deep palmar arch. The internal thoracic artery arises from the first part of the subclavian artery in the base of the neck. The 1st to 6th anterior intercostal arteries arise directly from the lateral aspect of the internal thoracic artery. The 7th to 9th arise from the musculophrenic artery, a branch of the internal thoracic artery.