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→About the Heart
==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]].
: The '''heart''' is protected by the [[Rib Cage|rib cage]].