What causes the sound your heart makes?
When someone listens to your heart with a stethoscope the
sound is often described as - lub-dub lub-dub. The 1st heart
sound (lub) is caused by the acceleration and deceleration
of blood and vibration of the heart at the time of the closure
of the Tricuspid and Mitral Valves. The 2nd heart sound (dub)
is caused by the same acceleration and deceleration of blood
and vibrations at the time of closure of the Pulmonic and
How may times does you heart beat?
The average heartbeat is 72 times per minute. In the course
of one day it beats over 100,000 times. In one year the heart
beats almost 38 million times, and by the time you are 70
years old, on average, it beats 2.5 billion times!
Does your heart rate change as we
Everyone's pulse (average heart rate per minute) changes as
we age. Here is a chart of average pulse at different ages:
||60 - 100
How much blood does your heart pump?
An average heart pumps 2.4 ounces (70 milliliters) per heartbeat.
An average heartbeat is 72 beats per minute. Therefore an
average heart pumps 1.3 gallons (5 Liters) per minute. In
other words it pumps 1,900 gallons (7,200 Liters) per day,
almost 700,000 gallons (2,628,000 Liters) per year, or 48
million gallons (184,086,000 liters) by the time someone is
70 years old. That's not bad for a 10 ounce pump!