Originally Posted by pudendum
I apologize for my overly technical and verbose explanation regarding blood pressures in the cavernosa at full erection. The point I wanted to get across was that after the cavernosa and spongiosum fill and reach a pressure equal to the blood pressure throughout the rest of the body, no more blood can enter as ticktickticker said. But part of the reflex that causes erections cause the Ischiocavernosus muscles to contract (located deep to the scrotum where the cavernosa anchor to the pelvic bone; they override the cavernosa at this anchoring point). This forces blood up into the rest of the cavernosa causing the erection to get firmer and stand out. This generates a pressure within the cavernosa 80 - 90% above the blood pressure in the rest of the body.
I should have said it this way in my prior post. I will in the future.
Thank you pudendum for that clarification.
Later - ttt