What exactly is a penile erection medically? Is it hypertrophy or hyperplasia? How can one explain it?

Question

In medical terms what is it? Why only the p***s has got this peculiar property? Was just wondering.... Thanks for your patience. Hope this was not odd to read.

Answer 1

If you type up hypertrophy on your computer, o brilliant one, a page will pop up w/various websites.  Scroll down to Wikepedia & it will explain fully the difference between hypertrophy & hyperplasia.