AS Biology - Blood Pressure in the Aorta

Can somebody please help me on this question?
"Explain why the blood pressure in the aorta doesn't decrease below 11kPa"

Reply 1

NNB_Herath

I would think
Because the aorta wall contains elastic fibers which can Stretch to accommodate more blood and they can also Recoil to maintain high blood pressure.
Also the smooth muscles in aorta wall can constrict to maintain high blood pressure and dilate ( to lower the blood pressure)
They also have a narrow lumen so maintains high blood pressure

In addition it has Semilunar valves which prevent the backflow of blood into the ventricles from the aorta.

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