APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -Right atrium: Receives blood returning to the heart from the superior and inferior vena cava; transmits blood to the right ventricle, which pumps blood to the lungs for oxygenation.

Detailed explanation-2: -Both the superior vena cava and inferior vena cava empty blood into the right atrium. Blood flows through the tricuspid valve into the right ventricle. It then flows through the pulmonic valve into the pulmonary artery before being delivered to the lungs.

Detailed explanation-3: -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.