The Blood Stream
The River Of Life - The Flow - Five things the
blood does as it flows through the human body.
Carries Oxygen to the Cells and Removing Carbon Dioxide
from the Cells
All cells in the human body need to ingest oxygen,
and need to emit carbon dioxide, to exist. When we inhale, air enters
the air sacs of our lungs. Oxygen from the air, passes through the
capillaries that surround each air sac. The oxygen enters into the
blood stream.
The blood flow continues through
the circulatory system, going through the arteries
supplying the oxygen and other nourishment to all our cells.
At the same time it removes carbon dioxide and other waste products
from the cells.
It then continues its flow reaching the lungs
and when we exhale the carbon dioxide is then released then into
the air. New oxygen is ingested into the bloodstream; it then flows
to the heart, which pumps it back into the body to further replenish
the cells.
Transporting Nutrients to the Cells and Removing
Waste From the Cells
After food passes
through our stomachs it enters the small intestine where digestion
is completed.
The digested food molecules enter the stream
through the capillaries in the small intestine. It then continues
its flow nourishing the cells and organs in the body with
the proper nutrients. At the same time waste enters the stream
through the capillaries. As it flows into the liver, the liver
filters the waste turning the harmful substances into urea
which then gets passed out in the urine.
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Protecting us From Diseases
As it flows through the body the white blood
cells,of which there are several types, get activated. When they
sense an invasion of any harmful substance in our bodies, they act
in various ways either they kill, surround or digest the bacteria,
or they produce anti-bodies and proteins that destroy the bacteria.
Carrying the Necessary Hormones
When the endocrine glands produce hormones they
get released into the stream which acts as the chemicals messenger.
When the hormone reaches the body part that it is supposed to regulate
it releases it.
Distributing the Body Temperature
All cell activities produce heat. Some cells
produce more heat then others. When the heat enters the blood stream
it travels through the body where excess heat escapes through the
skin. This heat regulation keeps the body temperature evenly distributed
throughout the body making sure the heat producing cells don't over
heat and the extremities don't freeze.
Here you can read about what actualy exists in
the
blood flow as it flows through the circulatory
system.
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Heart
