PATHOLOGY

Detailed explanation-1: -The superior vena cava measures 24 mm in diameter. The veins that receive venous blood return from the upper portion of the body, above the diaphragm, are short in length. The superior vena cava is the body’s largest vein.

Detailed explanation-2: -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.