Question

question 10 (1 point) which \tiny doors\ open and close when blood is pumped through the heart? heart valves atria chordae tendinae ventricles

Explanation:

Heart valves are structures in the heart that open and close to regulate blood - flow direction as the heart pumps blood. Atria are the upper chambers of the heart, chordae tendineae are fibrous cords that anchor the valves, and ventricles are the lower chambers of the heart.

Answer:

Heart Valves