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==Key Stage 2==
===Meaning===
[[File:Heart.png|right|300px|thumb|A computer drawing of a '''heart'''.]]
The '''heart''' is an [[organ]] which [[Pump|pumps]] [[blood]] around the body.
==About the Heart==
: The '''heart''' is mostly [[muscle]].
: The [[muscle]]s in the heart squeeze and relax to pump [[blood]].
: A healthy '''heart''' beats around 70 times per minute when you are resting.
: The '''heart''' beats faster when you [[exercise]].