Anatomy of the heart - Coronary circulation

4 important questions on Anatomy of the heart - Coronary circulation

Where does the left and right coronary artery come from?

From the base of the aorta and encircles the heart in the coronary sulcus

Left coronary artery

Towards the left side of the heart and divides into two major branches:
1. Anterior interventricular artery, follows the interventricular sulcus and supplies blood to the interventricular septum and anterior walls of both ventricles
2. Circumflex artery, supplies the left atrium and the posterior walls of the ventricle

Where cardiac veins?

After passing through the capillary beds of the myocardium, it's collected by the cardiac veins, whose paths roughly follow those of the coronary arteries.
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What is the coronary sinus?

The cardiac veins that join to form the coronary sinus, which empties the blood into the right atrium.
Coronary sinus is on the posterior aspect of the heart.

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