Why is Aorta sometimes called Compression chamber? 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.

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**.