The heart muscle contracts and relaxes when calcium is released from a reservoir inside into the muscle cell and then pumped back quickly.

BBC: Gene link to inherited heart disease

Let's see what happens when Europe finally relaxes monetary policy.

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When injected in diluted form, Botox relaxes muscle movements that cause twitches and stuttering as well as those distressing wrinkles.

ECONOMIST: Beauty treatments

Although both are working in careers, the husband still considers that the wife should perform the traditional chores that women performed when they did not work and the man still relaxes since he had a hard work day.

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