MICROANATOMY

Detailed explanation-1: -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.

Detailed explanation-2: -The venae cavae empties the deoxygenated blood into the right atrium of the heart. The venae cavae has two divisions. The superior vena cava resembles a drain that leads down into the heart. Its job is to return deoxygenated blood to the heart from the head and arms.

Detailed explanation-3: -These venules become progressively larger vessels called veins. The vena cava are the two largest veins that carry blood into the right upper chamber of the heart (the right atrium). The superior vena cava carries blood from the brain and arms into the top of the right atrium.

Detailed explanation-4: -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-5: -Superior vena cava: This large vein delivers oxygen-poor blood from your upper body into your heart’s right atrium.