Cardiac Veins and Their Functions

The video tutorial discusses the venous drainage of the heart, focusing on the cardiac veins. It explains the two systems: the greater system, which drains most of the myocardium into the right atrium via the coronary sinus, and the smaller system, which includes Thebesian veins that drain directly into adjacent heart chambers. The tutorial details the major tributaries of the coronary sinus, including the great, middle, and small cardiac veins, and highlights the unique drainage pattern of the anterior cardiac veins.

What are the two systems of cardiac veins discussed in the video?

• Greater and lesser systems

• Greater and smaller systems

• Major and minor systems

• Primary and secondary systems

Which vein is a major tributary of the coronary sinus and is found in the anterior interventricular sulcus?

• Anterior cardiac vein

• Great cardiac vein

• Small cardiac vein

• Middle cardiac vein

Where does the middle cardiac vein drain?

• Directly into the right atrium

• Into the small cardiac vein

• Into the coronary sinus

• Into the left atrium

Which cardiac vein follows the inferior border of the heart?

• Anterior cardiac vein

• Great cardiac vein

• Middle cardiac vein

• Small cardiac vein

Which vein is typically superficial to the right marginal branch?

• Middle cardiac vein

• Great cardiac vein

• Small cardiac vein

• Anterior cardiac vein

What is unique about the anterior cardiac veins?

• They are found in the posterior interventricular sulcus

• They drain into the left atrium

• They feed into the coronary sinus

• They drain independently into the right atrium

Which veins are sometimes referred to as thebesian veins?

• Anterior cardiac veins

• Small cardiac veins

• Middle cardiac veins

• Great cardiac veins

Where are the thebesian veins most densely located?

• In the coronary sinus

• Around the right atrium

• Around the left ventricle

• In the anterior interventricular sulcus

What is the role of the smaller system of cardiac veins?

• To drain the sub-endocardial myocardium

• To connect the left and right ventricles

• To regulate heart rate

• To supply blood to the coronary sinus

What is the primary function of the coronary sinus?

• To connect the left and right atria

• To regulate heart rhythm

• To drain deoxygenated blood from the myocardium

• To supply oxygenated blood to the heart