Function of subclavian artery…


Let’s know what is the function of subclavian artery

In human anatomy, the subclavian arteries are connected to the major arteries of the upper thorax, below the clavicle. They receive blood from the aortic arch. The left subclavian artery supplies blood to the left arm and the right subclavian artery supplies blood to the right arm, with some branches supplying the head and thorax. On the left side of the body, the subclavian arises directly from the aortic arch, while from the right it arises from a relatively short brachiocephalic artery when it divides into the subclavian and right common carotid artery.

The common branches of the subclavian on both sides of the body are the vertebral artery, the internal thoracic artery, the thyrocervical trunk, the costocervical trunk, and the dorsal scapular artery, which can close the transverse cervical artery, which is a branch of the thyrocervical trunk. The subclavian axillary artery is formed at the lateral border of the first rib.

The structure of subclavian artery

From its origin, the subclavian artery travels posteriorly, passes between the anterior and middle scalene muscles, with the anterior scalene (scalenus anterior) anteriorly and the middle skull (scalenus medius) posterior to it. This is in contrast to the subclavian vein, which leads the anterior to the scalenus anterior. As the subclavian artery crosses the lateral border of the first rib, it becomes the axillary artery.

The right subclavian artery arises from the brachiocephalic vein(spontaneous) artery behind the right sternoclavicular articulation; On the left, it falls from the arch of the aorta. The two vessels, therefore, differ in length, direction, and relation with neighboring structures, in the first part of their course.

To facilitate the description, each subclavian artery is divided into three parts:

  • The first part extends from the origin of the vessel to the middle range of the scalenus anterior.
  • The second is behind this muscle.
  • The third extends from the lateral margin of the muscle to the outer border of the first rib, where it becomes the axillary artery.

The first portions of the two vessels require separate descriptions; the second and third parts of the two arteries are practically alike.