Heart and the fist

The blood in the lungs returns to the heart through the pulmonary veins. Zach Walker had been one of the toughest of the tough. If you listen to your heart beat, you'll hear two sounds. The atria act as receiving chambers for blood, so they are connected to the veins that carry blood to the heart. Variations in the waveform and distance between the waves of the EKG can be used clinically to diagnose the effects of heart attacks, congenital heart problems, and electrolyte imbalances. The aorta, the largest artery in the body, is almost the diameter of a garden hose.

Duration: 8:10
Uploaded: 23.02.2018

99 Votes


The heart is a muscular organ about the size of a closed fist that functions as the body’s circulatory pump. It takes in deoxygenated blood through the veins and. Map of the Human Heart. Day and night, the muscles of your heart contract and relax to pump blood throughout your body. In the Step Thru below, see the complicated. Your heart is a hard-working muscle. Find out more in this article for kids.


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