Name the arteries that branches off the subclavian arteries and extends into thoracic region.

The subclavian artery is one of the most important arterial routes of the head, neck and thorax, since together with the carotids it is the main source of oxygenated blood for the thoracic region, the brain and all its areas. There are two subclavian arteries, the right is further from the thorax while the left is inside the thorax.

Explanation:

The right and left subclavia originate differently, with the left having a longer course with an intrathoracic course. Being a main artery, it is in charge of irrigating important parts, the best known are: they cross the scalenes, clavicle, axis, cranial cavity, spinal cord, rhombencephalon, ribs, cerebellum, thorax, thyroid, thymus, pericardium, diaphragm, scapula, muscles and cervical vertebrae.The left subclavian artery begins in the thorax lower than the right subclavian artery, runs posterior to the left primitive carotid and lateral to the trachea.In the subclavian we recognize a prescalenic trajectory, the collateral branches that present the subclavias are born in the prescalenic trajectory and are: vertebral artery, internal thoracic artery, transverse artery of the neck, suprascapular artery, dorsal artery of the scapula. Internal thoracic artery runs down in front of the pleural dome, entering the thorax where it runs vertically behind the costal cartilages to the sixth intercostal space. In this course it gives anterior intercostal branches that anastomose to the intercostal arteries coming from the thoracic aorta, thus supplying the thoracic wall.