PATHOLOGY

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 union of the internal and external iliac veins creates the common iliac vein, while the inferior epigastric vein drains into the external iliac vein and anastomoses from the superior epigastric vein. The primary function of these veins is to drain deoxygenated blood and return this blood to the heart.

Detailed explanation-3: -The popliteal vein is formed by the confluence of the deep veins of the leg, i.e. the posterior tibial, anterior tibial and common fibular veins. It also receives venous blood from the superficial vein of the lateral leg, i.e. the short saphenous vein.