00:00Do you know how the heart works?
00:03Our heart is like a small pump inside us.
00:07It contracts and pushes blood through tubes called blood vessels
00:11so that the blood carries oxygen and nutrients to all parts of the body.
00:16Then the heart fills with blood again and pushes it forward once more,
00:21non-stop, like a pumping pump.
00:24Yay!