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I find this statement that Aorta is called Compression Chamber in my study materials.

Aorta can

  • it keeps blood flowing
  • it can accumulate potential energy for bumping and compression

However, why aorta is called chamber and particularly compression chamber? I heard this term today first time.

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up vote 1 down vote accepted

The aorta is a compression chamber because it is an important drive for diastolic perfusion. To keep the blood flowing constantly, and not only during systole (as would be the case with a rigid aorta), the high elasticity of the aortic walls allows it to dilate as a consequence of the high systolic pressure. This allows the aorta to accumulate blood in its proximal part, which is then propelled by the passive elastic contraction of the aorta during diastole.

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