Biology, 25.11.2020 20:20 LeoValdez5782
1. how many chambers does the human heart have?
2. what close the valves in the heart and why should they do this?
3. what do we call a pulse?
4. describe blood capillaries
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Approximately how many times does an average human heart beat in a lifetime?
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1. how many chambers does the human heart have?
2. what close the valves in the heart and why shoul...
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