Arch of aorta starts at the level of sternal angle and also end here.
It gives three branche's
1. Brachio Cephalic artery-
It is divide into right common carotid and right subclavian artery.
2. Left common carotid artery-
Each common carotid artery (CCA) is divide into internal and external carotid artery and supply to the head and neck region.
3. Left subclavian artery-
Subclavian artery further continues in the axillary artery, brachial artery.
Upper limb blood supply overview:
• After crossing 1st rib subclavian artery is called axillary artery
• After crossing teres major axillary artery is called brachial artery.
• Brachial artery gives two terminal branches, radial and ulnar artery.
• In hand radial and ulnar artery form superficial and deep palmar arches.