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>Heart beats continuously and pumps blood.

>Heart is controlled by autonomous nervous system when brain isn't aware about it or is at rest.

>While the beats are regulated by medulla oblongata situated in hind brain.

>The two autonomous nervous system: Sympathetic and parasympathetic nervous system; act complimentorily and contradictorily which controls involuntary activities.

>For example, if the heart beat increases due to sympathetic nervous system than normal, it is brought under control and lowered by the action of parasympathetic nervous system.

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