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In a healthy heart all activities and rests during each individual cardiac cycle, or heartbeat, are initiated and orchestrated by signals of the heart's electrical conduction system, which is the "wiring" of the heart that carries electrical impulses throughout the body of cardiomyocytes, the specialized muscle cells of the heart.
Heart_attack_animation.ogv (Ogg multiplexed audio/video file, Theora/Vorbis, length 3 min 3 s, 340 × 384 pixels, 389 kbps overall, file size: 8.45 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Blood flow through the valves Blood flow through the heart Video explanation of blood flow through the heart. The heart functions as a pump in the circulatory system to provide a continuous flow of blood throughout the body. This circulation consists of the systemic circulation to and from the body and the pulmonary circulation to and from the ...
The heart gets an assist from another pump in blood circulation. Called the "second heart," it only starts pumping when legs move.
Humans have a four-chambered heart consisting of the right and left atrium, and the right and left ventricle. The atria are the two upper chambers which pump blood to the two lower ventricles. The right atrium and ventricle are often referred to together as the right heart, and the left atrium and ventricle as the left heart.
Cross-country skiing is a great activity because it boosts your cardiac output, meaning your heart gets better at pumping blood and transporting oxygen. The result? A stronger heart. 9. Stair climbing
Blood is pumped from the heart, pushing open the pulmonary and aortic semilunar valves. Pressure generated by the left ventricle will be appreciably greater than the pressure generated by the right ventricle, since the existing pressure in the aorta will be so much higher. Nevertheless, both ventricles pump the same amount of blood.
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