Transport system in human beings
Transportation is the life process that
helps in the transport of materials in
nutrition, respiration and excretion
Heart, blood vessels and blood are the
parts of our transport system how in
electric pump pushes the water in the
pipes just in the similar way heart
pumps blood in the blood vessels to
different parts of our body. Heart is a
muscular four chambered organ which is
in the size of our fist. It has to do
two different jobs
1: It has to collect
the deoxygenated blood from the body
parts and send it to lungs this is done
by the right-side chambers right atrium
and right ventricle of the heart
2: It has to collect the oxygenated blood from
lungs and supply it to the body parts
this is achieved by the left side
chambers of the heart. But it does both
the job simultaneously. Let's see how it
does in action.
The left atrium and the
right atrium relaxes. Left atrium
collect the blood from lungs. Right atrium
gets the deoxygenated blood from the body
As they contract the left ventricle
and right ventricle expands, so that the
blood is transferred to them. When the
left ventricle contracts in its turn the
blood is pumped out to the body the
right ventricle contracts in its turn,
pumps the blood to the lungs for
oxygenation. In higher animals like birds
and mammals the four chambered heart
keeps the oxygenated and deoxygenated
blood separate. The circulation of blood
through the heart takes place twice.
Once between the heart and lungs and the second time between heart and body parts
hence this circulation is called double
circulation
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