ANATOMY

Detailed explanation-1: -The left and right brachiocephalic vein join to form the superior vena cava on the right side of the upper chest. These vessels are a vital component of the human circulatory system, aiding in drainage of deoxygenated blood from the head and upper limbs.

Detailed explanation-2: -3.2. 12.118 On each side the subclavian and internal jugular veins unite, to form the right and left brachiocephalic veins.

Detailed explanation-3: -The right and left brachiocephalic veins, also known as the innominate veins, join to form the superior vena cava posterior to the inferior border of the first right costal cartilage. These veins carry blood from the chest wall, esophagus, lungs, neck, and pericardium.

Detailed explanation-4: -Halfway along its course, before it enters the pericardium, the SVC receives the azygos arch. The brachiocephalic veins are formed at the confluence of the subclavian and internal jugular veins behind the sternoclavicular joints (see Figure 2.4).