Why is human heart not a centrifuge pump

[Mihitzzz]

Homework Statement

Why is human heart not a centrifuge pump but positive displacement pump ?

Homework Equations

The Attempt at a Solution

Maybe bcoz there is no continuous flow of blood. blood goes thru body in packets hence we hear heart beats..

 

[Borek]

I thing you are getting it reversed - there is no continuous flow of blood because the heart is a displacement pump. Besides, what you wrote is a kind of not-an-answer - it doesn't address "why", just mentions some tangential facts.

As far as I remember there is only one animal with a strictly rotating organ, apparently these are hard to evolve.