How the Body Works : The Heart

The Heart

The heart is a muscular organ which pumps blood throughout the body. The continuous driving force is generated by the action of cardiac muscle-a specialized form of muscle. The muscle is arranged as whorls of tissue surrounding the two cavities of the ventricles. The left ventricle is larger as it is required to pump blood around the general circulatory system. The right ventricle only pumps blood along the shorter circuit through the lungs. The autonomic nervous system controls changes in the rate of heartbeat.

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[k2l11]

lols i agree with you. the left on the diagram is the SVC (Right side of our body) and the right on the diagram is the pul veins which is on the (left side of our body)

[bashibazouks77]

i tot the left is on the right and the right is on the left. WRONG!! ORH HOR!

[AnatomaniaK]

how about "ans controls changes in the rate of heart beat"?

[bigworld1001]

i meant to say modulate.

[bigworld1001]

incorrect. the ans can modualte it but it does not have overall control

[AnatomaniaK]

the autonomic nervous system controls the heart beat!

[tonyballa07]

those really healthy hearts