Ninja Nerd - Circulatory System | Coronary Circulation Quiz

Coronary Circulation

• The coronary circulation is responsible for providing oxygenated blood to the myocardium of the heart.
• The coronary circulation begins in the left ventricle, where the left ventricle pumps blood through the aortic semilunar valve into the ascending aorta.

Structures Involved in Coronary Circulation

• Ascending aorta: receives blood from the left ventricle and is the starting point for the coronary circulation.
• Aortic semilunar valve: separates the left ventricle from the ascending aorta and prevents backflow.
• Right and left coronary arteries: tiny arteries that branch off from the ascending aorta to supply the myocardium with oxygenated blood.

Right Coronary Artery

• Supplies the myocardium on the right side of the heart.
• Branches off into smaller arteries, including the marginal artery and posterior interventricular artery.
• Marginal artery: supplies the right ventricle and a portion of the lateral side of the heart.
• Posterior interventricular artery: supplies the posterior aspect of the heart.

Left Coronary Artery

• Supplies the myocardium on the left side of the heart.
• Branches off into smaller arteries, including the anterior interventricular artery and circumflex artery.
• Anterior interventricular artery (also known as the left anterior descending artery): supplies the interventricular septum and a portion of the left and right ventricles.
• Circumflex artery: supplies the left atrium and a portion of the left ventricle.

Venous Return

• Deoxygenated blood from the myocardium returns to the heart through veins, including the small cardiac vein, middle cardiac vein, great cardiac vein, and posterior vein of the left ventricle.
• These veins empty into the coronary sinus, a large vein that drains deoxygenated blood into the right atrium.
• From the right atrium, blood flows into the right ventricle and then to the pulmonary circulation to pick up oxygen.

Importance of Diastole

• The myocardium receives blood supply only when the heart is in diastole (relaxation period).
• A high heart rate can impede the heart's ability to receive adequate blood supply, leading to potential problems.

Coronary Circulation

• Provides oxygenated blood to the myocardium of the heart.

Structures Involved in Coronary Circulation

• Ascending aorta: receives blood from the left ventricle and is the starting point for the coronary circulation.
• Aortic semilunar valve: separates the left ventricle from the ascending aorta and prevents backflow.
• Right and left coronary arteries: tiny arteries that branch off from the ascending aorta to supply the myocardium with oxygenated blood.

Right Coronary Artery

• Supplies the myocardium on the right side of the heart.
• Branches off into smaller arteries, including the marginal artery and posterior interventricular artery.
• Supplies the right ventricle and a portion of the lateral side of the heart through the marginal artery.
• Supplies the posterior aspect of the heart through the posterior interventricular artery.

Left Coronary Artery

• Supplies the myocardium on the left side of the heart.
• Branches off into smaller arteries, including the anterior interventricular artery and circumflex artery.
• Supplies the interventricular septum and a portion of the left and right ventricles through the anterior interventricular artery.
• Supplies the left atrium and a portion of the left ventricle through the circumflex artery.

Venous Return

• Deoxygenated blood from the myocardium returns to the heart through veins, including the small cardiac vein, middle cardiac vein, great cardiac vein, and posterior vein of the left ventricle.
• These veins empty into the coronary sinus, a large vein that drains deoxygenated blood into the right atrium.
• From the right atrium, blood flows into the right ventricle and then to the pulmonary circulation to pick up oxygen.

Importance of Diastole

• The myocardium receives blood supply only during diastole (relaxation period).
• A high heart rate can impede the heart's ability to receive adequate blood supply, leading to potential problems.

Coronary Circulation

• Provides oxygenated blood to the myocardium of the heart.

Structures Involved in Coronary Circulation

• Ascending aorta: receives blood from the left ventricle and is the starting point for the coronary circulation.
• Aortic semilunar valve: separates the left ventricle from the ascending aorta and prevents backflow.
• Right and left coronary arteries: tiny arteries that branch off from the ascending aorta to supply the myocardium with oxygenated blood.

Right Coronary Artery

• Supplies the myocardium on the right side of the heart.
• Branches off into smaller arteries, including the marginal artery and posterior interventricular artery.
• Supplies the right ventricle and a portion of the lateral side of the heart through the marginal artery.
• Supplies the posterior aspect of the heart through the posterior interventricular artery.

Left Coronary Artery

• Supplies the myocardium on the left side of the heart.
• Branches off into smaller arteries, including the anterior interventricular artery and circumflex artery.
• Supplies the interventricular septum and a portion of the left and right ventricles through the anterior interventricular artery.
• Supplies the left atrium and a portion of the left ventricle through the circumflex artery.

Venous Return

• Deoxygenated blood from the myocardium returns to the heart through veins, including the small cardiac vein, middle cardiac vein, great cardiac vein, and posterior vein of the left ventricle.
• These veins empty into the coronary sinus, a large vein that drains deoxygenated blood into the right atrium.
• From the right atrium, blood flows into the right ventricle and then to the pulmonary circulation to pick up oxygen.

Importance of Diastole

• The myocardium receives blood supply only during diastole (relaxation period).
• A high heart rate can impede the heart's ability to receive adequate blood supply, leading to potential problems.