MEDICAL PHYSIOLOGY

Detailed explanation-1: -Your superior vena cava, your second biggest vein, brings oxygen-poor blood from your upper body to your 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: -The two largest veins in the body are the superior vena cava, which carries blood from the upper body directly to the right atrium of the heart, and the inferior vena cava, which carries blood from the lower body directly to the right atrium. The inferior vena cava is labeled in the figure below.

Detailed explanation-4: -The largest vein in the human body is the vena cava which consists of superior and inferior vena cava. Inferior vena cava lies posterior to the abdominal cavity and runs along the right side of the vertebral column.