The document describes the human circulatory system. It is comprised of three main parts - the heart, lungs, and blood vessels. The heart pumps oxygenated blood to the lungs, where carbon dioxide is removed and oxygen is added back into the blood. The blood is then pumped throughout the body by arteries and returns to the heart through veins, delivering oxygen to cells and picking up carbon dioxide to be removed. The cycle then repeats continuously.

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Human circulatory system

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Human circulatory system
This system is one of the most important in the body.
It is made up of 3 main parts:
•The heart
•The Lungs
•The blood vessels.
This system is also known as the cardiovascular
system.

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Human circulatory system
Heart
Lungs
Heart
Body
Blood
pumping

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Heart
Lungs
Heart
Body
Blood
pumping
The heart pumps blood to the lungs
Human circulatory system

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Heart
Lungs
Heart
Body
Blood
pumping
The lungs remove the carbon dioxide from the blood and refill
it with oxygen.
Human circulatory system

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Heart
Lungs
Heart
Body
Blood
pumping
The heart then pumps the blood around the body.
Human circulatory system

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Heart
Lungs
Heart
Body
Blood
pumping
The blood is transported all around the body, where oxygen is taken and
replaced with carbon dioxide.
Human circulatory system

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Heart
Lungs
Heart
Body
Blood
pumping
The blood is cleaned in the kidneys to remove all the waste before it returns
to the heart.
Human circulatory system

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Heart
Lungs
Heart
Body
Blood
pumping
The cycle starts again
Human circulatory system

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The blood vessels run
throughout the body
supplying oxygen to every
cell in the body.
They are made up of 3
types – arteries, veins and
capillaries.
Human circulatory system

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Arteries are thick blood vessels
that you can easily feel in the form
of a pulse.
They transport oxygenated
blood to the cells.
As they are full of oxygen, they
appear to be a deep red colour.
Arteries

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Veins are thick blood vessels.
They transport blood back to the
heart from the cells.
As they have little oxygen, they
appear to be more a blue colour
than red.
Veins

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Capillaries are thin blood
vessels.
They allow oxygen and nutrients to
pass to the cells, and waste products and
carbon dioxide to be removed from
them.
They are small to allow them to
reach every cell in the body.
Capillaries

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Thanks
Ishant Sinha
Shimla

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