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Body Works
Have
your students close their hand into a fist and open it again and again, for a
few minutes. Ask if their hand is getting tired.
Muscles
need a rest, but the heart, even though it is a muscle, never stops to sleep!
Your
heart is the size of your fist, it is in the middle of your chest, between
your lungs and behind your ribs and breastbone. It is tipped a little forward
on the left side.
As the
heart muscle contracts (squeezes),
it pumps blood through its chambers
(spaces or rooms in the heart) and out into your body through tubes called arteries. The blood returns to your
heart through tubes called veins.
All of these parts working together are a
system. This system is known as the circulatory system, because the blood
circulates or moves around the body.
Internet Site
HeartBeat
Activity. Press Here
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