GROSS ANATOMY

Detailed explanation-1: -Coronary veins are responsible for draining deoxygenated blood from the myocardium into the cardiac chambers. Comprised of two venous systems, coronary veins classify into either the greater cardiac venous system or the smaller cardiac venous system.

Detailed explanation-2: -The middle cardiac vein collects blood from the areas supplied by the posterior interventricular artery. The small cardiac vein drains the blood from the posterior surfaces of the right atrium and ventricle. The anterior cardiac veins drain the anterior surface of the right ventricle.

Detailed explanation-3: -The middle cardiac vein, also known as the posterior interventricular vein, is a vessel located on the posterior aspect of the heart. It arises at the cardiac apex and runs within the posterior interventricular groove. It ends by draining into the right atrium via the coronary sinus.

Detailed explanation-4: -The coronary sinus describes a major coronary vein located in the rear section of the heart. Many smaller cardiac veins connect to it to make it the largest vein of the heart. The main function of the CS is to drain deoxygenated blood from the heart muscle into the right atrium.