"Coronary Circulation Diagram | Heart Blood Supply | Drawing for Medical Students/Easy Explanation" скачать в хорошем качестве

"Coronary Circulation Diagram | Heart Blood Supply | Drawing for Medical Students/Easy Explanation"

The heart receives its blood supply from the right and left coronary arteries, which are the first branches of the ascending aorta. These arteries encircle the heart like a crown within the coronary sulcus and provide oxygenated blood to the myocardium. 1. Right Coronary Artery (RCA): The RCA arises from the right aortic sinus and runs in the right atrioventricular groove. It supplies the right atrium, most of the right ventricle, the inferior part of the left ventricle, and the posterior one-third of the interventricular septum. Major branches: Right marginal artery – supplies the right ventricular wall. Posterior interventricular (posterior descending) artery – supplies the posterior septum and adjacent ventricular walls. 2. Left Coronary Artery (LCA): The LCA arises from the left aortic sinus and passes between the pulmonary trunk and the left atrium. It quickly divides into two main branches: Anterior interventricular (left anterior descending, LAD) artery: runs in the anterior interventricular groove, supplying the anterior wall of the left ventricle, anterior two-thirds of the interventricular septum, and part of the right ventricle. Circumflex artery: runs in the left atrioventricular groove, supplying the left atrium and lateral and posterior parts of the left ventricle. 3. Venous Drainage: Most of the venous blood is drained by the coronary sinus, which opens into the right atrium. It receives blood from the great cardiac vein, middle cardiac vein, and small cardiac vein. A few small veins (thebesian veins) directly open into the heart chambers. 4. Coronary Dominance: The coronary circulation is described as right-dominant, left-dominant, or balanced, depending on which artery gives rise to the posterior interventricular artery. Right dominance (about 70%): RCA gives the posterior interventricular branch. Left dominance (about 10%): Circumflex branch of LCA gives this artery. Balanced (20%): both contribute. ❤️ Queries Solved in This Diagram (Heart Blood Supply Anatomy) 1. Identification of the four chambers of the heart — right atrium, right ventricle, left atrium, and left ventricle. 2. Position and location of each chamber — atria on the superior and posterior side, ventricles on the inferior and anterior side. 3. External surface markings of the heart — anterior and posterior interventricular grooves, coronary sulcus, and apex position. 4. Origin of coronary arteries — both right and left coronary arteries arising from the ascending aorta (aortic sinuses). 5. Course of the Right Coronary Artery (RCA) — passing through the right atrioventricular groove, giving branches to the right atrium and ventricle. 6. Branches of RCA — right marginal artery and posterior interventricular (posterior descending) artery. 7. Course of the Left Coronary Artery (LCA) — passing between pulmonary trunk and left auricle, dividing into two main branches. 8. Branches of LCA — anterior interventricular (LAD) artery and circumflex artery. 9. Areas supplied by coronary arteries — mapping of regions of atria, ventricles, and interventricular septum supplied by RCA and LCA. 10. Concept of coronary dominance — which artery gives rise to the posterior interventricular branch. 11. Venous drainage of the heart — coronary sinus, great cardiac vein, middle cardiac vein, and small cardiac vein. 12. Relation of arteries and veins on the heart surface — showing how they lie within the grooves and sulci. 13. Anastomosis between coronary arteries — regions where right and left coronary branches connect. 14. Clinical importance — blockage in coronary arteries leading to ischemia or myocardial infarction. 15. Overall functional importance — continuous coronary circulation ensures oxygen supply to myocardium. #HeartBloodSupply #CoronaryArteries #HeartAnatomy #AnatomyDrawing #MedicalDrawing #CoronaryCirculation #HumanHeart #CardiacAnatomy #AnatomyArt #MedicalStudents #AnatomyTutorial #AnatomyMadeEasy #BiologyDrawing #HeartDiagram #AnatomyForBeginners