MEDICAL PHYSIOLOGY

Detailed explanation-1: -The SVC is a large vein that drains blood away from the head, neck, arms, and upper chest and into the heart.

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: -Superior vena cava collects deoxygenated blood from the upper half of the body or in this case, head and neck, upper limbs, along with thoracic wall, and upper abdomen and drains it into the right atrium of heart.