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


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


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


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


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