Human Circulatory System, Human Heart Complete Circulatory System.
It should every day your heart beats about 100,000 times sending 2,000 gallons of blood surging through your body although it's no bigger than your fist your heart has the mighty job of keeping the blood flowing through 60,000 miles of blood vessels that feed your organs and tissues food water and oxygen are essential for the existence of human life blood transports all these substances through various channels called blood vessels.
circulatory system
Blood vessels
involves arteries veins capillaries to keep the blood flowing throughout our
body we have a pumping system and the heart is the pump which is composed of
muscle that pumps blood throughout the body beating approximately 72 times per minute
of our lives the human heart has four chambers.
The right atrium the
left atrium the right ventricle and the left ventricle.
There are four valves
in the heart these valves are tricuspid valve mitral valve aortic valve
pulmonary valve these valves are one-way valves now you have seen the structure
of the heart let us find out how it works the blood becomes oxygen-rich by absorbing
oxygen in the lungs the function of the heart starts when oxygenated blood is
carried from the lungs to the left atrium of the heart by means of the pulmonary
veins the left atrium relaxes this blood is pumped into the heart when the left
atrium contracts the left ventricle relaxes simultaneously the left atrium
pushes the blood into the left ventricle through the one-way valve when the
left ventricle tracks the blood is pumped into the aorta which carries
oxygenated blood to the different parts of the body except the lungs oxygenated
blood reaches the different parts of the body through the blood vessels called
the arteries the arteries gets branched into capillaries which then reaches to
the different organs of the body the blood and becomes deoxygenated and the
blood capillaries gets mixed and form thicker blood vessels called the veins
the veins carry deoxygenated blood to the heart the blood vessels that carry
deoxygenated blood heart are known as the vena cava the deoxygenated blood from
different parts of body enters the upper right chamber of the heart which is
called the right atrium traced allowing the blood to flow into the right
ventricle which contracts with the expansion of the right atrium through the
one-way valve the right ventricle then contracts pushing the blood into the
pulmonary artery the pulmonary artery carries the deoxygenated blood to the
lungs for oxygenation the lungs oxygenate the blood by exchanging of gases and
flows back into the heart through the pulmonary vein and starts the circulatory
cycle all over again.
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