heart4The heart is an organ made up of involuntary muscles.
We can’t control involuntary muscles. They move automatically.

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The heart is an involuntary muscle.
It moves all the time without us thinking about it, even when we’re asleep!

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The heart pumps blood around the body.
The heart contracts and relaxes to pump blood.
The heart pumps blood through the blood vessels.

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Blood gives our cells the oxygen and nutrients they need.
Blood also collects waste products (like carbon dioxide).

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The heart
by MagicBox Animation

“Your Heart Has a Beat” by StoryBots. The beat of this song lasts only a minute, but your heart will keep beating for your whole life!

How to feel your heart beat.
How to take your own pulse.
by SciShow Kids

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