Fill in the Blank QuestionFill in the blank question.The AV valves guard the opening between the and , which are chambers of the heart.

The AV valves guard the opening between the atria and ventricles, which are chambers of the heart.

The atria are the upper chambers of the heart that receive blood, while the ventricles are the lower chambers that pump blood out of the heart. The atrioventricular (AV) valves, which include the tricuspid valve (on the right) and the mitral valve (on the left), are crucial in ensuring one-way blood flow from the atria to the ventricles. These valves prevent the backflow of blood during ventricular contraction, thereby maintaining efficient circulation throughout the body.