If you place the first three fingers of your hand on the inside of your wrist, a dull throbbing reverberates through your hand. Da-dub, da-dub, da-dub. Very reassuring, these gentle thuds, that remind us that our bodies are kicking along, and that, at least at last touch, we’re alive and well.
The heart is a live pump that delivers blood to different parts of the body. Blood flows in or flows out when the heart contracts and expands. The blood is forced into the arteries, which expand to receive the oncoming blood.
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