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: -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-3: -Your right and left brachiocephalic veins merge to form your superior vena cava. This large vein is located above your heart, and it extends downward to drain blood into your right atrium (top right heart chamber). From there, your blood flows through the right side of your heart and into your lungs to gain oxygen.

Detailed explanation-4: -At the level of the inferior border of the 1st right costal cartilage, the left and right brachiocephalic veins converge to form the superior vena cava, which goes on to drain into the right atrium of the heart.