A Little Help On Anatomy?

sorin61

Experimental Member
Joined
Dec 26, 2009
Posts
27
Media
0
Likes
9
Points
148
I recently read an article and realized that I have never heard the whole truth about penile erection. Sure, try any anatomy book and you'll get the corpora cavernosa story with the blood filling it to achieve an erection, following the nervous stimuli.
Now that's all fine and good, but what I didn't know is the pressure inside the corpora cavernosa. Correct me if I'm wrong, but I think most men don't know that the pressure inside the penis during erection is the blood pressure of the body. Not more that that, as one might imagine. That is achieved simply by allowing the blood to flow inside the penis. There is no extra internal pump to fill the penis with blood.
The question I have is how is that achieved. As far as the anatomy courses say, I didn't find any valve that blocks the access of blood from the main blood vessels to the penis. Although, the logic says there should be one, otherwise the blood would flow all the time through the penis, maintaining it in a perpetual erect state.
Did anybody find the erection mechanism explained properly, taking into account the aforementioned?
 
  • Like
Reactions: cockydude2018
D

deleted1547822

Guest
Arteries and arterioles dilate and allow more blood in than the constricting venules and veins can allow out. Net result is positive pressure and filled corpus cavernosum (i.e.: erection). The bulbospongiosus and ischiocavernosus muscles play a part in constricting the return flow of blood.
 

Hairylegs

Legendary Member
Verified
Gold
Cammer
Joined
Apr 25, 2008
Posts
1,181
Media
1
Likes
1,719
Points
443
Location
Atlanta (Georgia, United States)
Verification
View
Sexuality
60% Gay, 40% Straight
Gender
Male
Technically, intrapenile pressure should be a bit higher than body BP. The restriction on the corpora by the internal fascia will boost pressure, and hydrostatic pressure from the little fella hanging below the heart should rais it also. You haven't lived until you've rammed a 16G needle into a priapic erect penis to drain blood and clots. Very messy, very Dracula. And the patient doesn't know if he should scream in pain or fear...