Question

Rhythmic movement of the heart while pumping blood​

Answer 1

Explanation:

Your heart has four chambers. Two upper chambers, called the left and right atria, and two lower chambers, called the left and right ventricles, contract in a steady rhythm known as your heartbeat.

Answer 2

Answer:

Rhythmic movements of the heart (upper trace) cause synchronous movement of the bookhmg lamellae (lower trace). The latter movements were recorded with a photoplate with light reflected from foil placed on the lamellae in the atrium. Systolic and diastolic movements of the heart cause displacements (lO-30~) of the booklung lamellae. This should stir the blood in the bookhmg sinus and cause some inspiratory and expiratory movement of air through the spiracle and atrium.

Explanation:

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