Amazing Facts

The heart and circulatory system for kids

The heart and circulatory system for kids

1. It takes 20 seconds for blood to circulate
the entire body. Oxygenated blood leaves the aorta about about 1
mile an hour.

2. The power output of the heart ranges from 1-5
watts per minute. Which is the equivalent to the usage of a 60
watt bulb. It has been said that enough energy is produced a day
to drive a truck 20 miles.

3. “Ventricle” means “little belly” in Latin
where as “Atrium” is Latin for “entrance hall”.

4. Red blood cells live for upto 4 months and
make approximately 250,000 round trips around the body before
returning to the bone marrow, where they were born, to die.
Between 2.5 and 3 million red blood cells (erythrocytes) are lost
and replaced every second.

5. Human blood is colourless, it is the hemoglobin that makes it red.

6. Due to the heart having its own electrical
impulse, it will continue to beat even when removed from the body
as long as it has an adequate supply of oxygen.

On average, the human body has about 5 liters (almost
9 pints) of blood continually traveling through it by way of the
circulatory system. A kitchen tap would need to be turned on all the
way for at least 45 years to equal the amount of blood pumped by the
heart in an average lifetime.

Related Tags: Heart  Blood  Oxygen  
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