Heart Coronary circulation (OLD version)

The video tutorial explains the coronary circulation system, focusing on the coronary arteries and cardiac veins. It details the right and left coronary arteries, their branches, and the concept of heart dominance. The innervation of coronary arteries by sympathetic and parasympathetic systems is discussed, highlighting their effects on vasodilation and vasoconstriction. The tutorial concludes with an overview of cardiac veins and the coronary sinus, emphasizing their role in draining deoxygenated blood from the heart.

What are the two main components of coronary circulation?

• Pulmonary arteries and veins

• Aorta and vena cava

• Coronary arteries and cardiac veins

• Capillaries and arterioles

Which artery supplies the right side of the heart?

• Aortic artery

• Pulmonary artery

• Right coronary artery

• Left coronary artery

What is the posterior descending artery also known as?

• Right marginal artery

• Posterior interventricular artery

• Left circumflex artery

• Anterior interventricular artery

What percentage of individuals have a right dominant heart?

• 33%

• 75%

• 50%

• 67%

What is another name for the left anterior descending artery?

• Right marginal artery

• Coronary sinus

• Anterior interventricular artery

• Posterior descending artery

What effect does sympathetic innervation have on coronary arteries?

• Increased heart rate

• Vasodilation

• No effect

• Vasoconstriction

Where does the coronary sinus drain blood into?

• Left atrium

• Left ventricle

• Right ventricle

• Right atrium