Adult heart in one minute is usually beats 70 times. If we stick our chest stethoscope to the left then we will listen to our own heartbeat. The sound is the sound of heart beats when the heart valves closing. Heart valve-shaped tissue is strong and thin layer attached to the heart muscle. The number of human heart valves have 4 pieces.
If your heart rate less than 40 but you are in good health, then you likely have a big heart can pump blood more than normal people who often found in sports athletes.
Kamis, 19 November 2009
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