MICROANATOMY

Detailed explanation-1: -The superior vena cava and inferior vena cava are very large veins that bring deoxygenated blood to your heart to get oxygen. Your inferior vena cava, your body’s largest vein, carries oxygen-depleted blood back to your heart from the lower part of your body (below your diaphragm).

Detailed explanation-2: -Arteries transport blood from the heart to the body tissues. Veins carry blood back to the heart.

Detailed explanation-3: -The superior vena cava carries blood from the brain and arms into the top of the right atrium. The inferior vena cava carries blood from the legs and abdominal cavity into the bottom of the right atrium. The vena cava are also called the “central veins".

Detailed explanation-4: -The SVC drains into the right atrium at the level of the third costal cartilage via a valveless orifice at the superior part of the sinus venarum, a smooth part of the posterior wall of the right atrium.