Heart Valves

The video tutorial explains the function and anatomy of heart valves, focusing on atrioventricular (AV) and semilunar valves. It describes how these valves ensure unidirectional blood flow and prevent backflow. The tutorial also covers the heart sounds associated with valve closures, specifically the 'lub dub' sounds, and highlights the anatomical differences between the valves.

What is the primary function of heart valves?

• To ensure blood flows from atria to ventricles

• To allow blood to flow in both directions

• To increase the speed of blood flow

• To decrease blood pressure

Which valve is located between the right atrium and ventricle?

• Pulmonary valve

• Tricuspid valve

• Aortic valve

• Bicuspid valve

What prevents the AV valves from prolapsing during systole?

• Semilunar valves

• Chordae tendineae and papillary muscles

• Pulmonary trunk

• Aortic arch

What sound is associated with the closing of the AV valves?

• Dub

• Lub

• Whoosh

• Click

Which mnemonic helps remember the location of the tricuspid valve?

• Try to be left

• Try to be right

• Try to be posterior

• Try to be anterior

What is the function of semilunar valves?

• To prevent backflow into the ventricles

• To decrease heart rate

• To increase blood pressure

• To allow blood to flow into the atria

Which heart sound is associated with the closing of semilunar valves?

• Lub

• Dub

• Click

• Whoosh