A hemipenis (plural hemipenes) is one of a pair of intromittent organs of male squamates (snakes, lizards and worm lizards). Hemipenes are usually held inverted within the body, and are everted for reproduction via erectile tissue, much like that in the human makkelijk.info come in a variety of shapes, depending on species, with ornamentation, such as spines or hooks.
Why Snakes Have Two Penises and Alligators Are Always Erect. From spiky penises to an extra clitoris, reptile reproductive parts don’t lack for variety. 4 Minute Read. By Tina Deines.
Mar 19, · Recently somebody asked me "Why do snakes have two penises?" When I tried to answer, I realized that I didn't really know. I did know that they only use one at a time, and I had once heard that it was so that they could copulate with a female no matter which side she was on, but that doesn't really seem to make sense to me any more, especially considering that lizards also have two makkelijk.info: Andrew Durso.
Nov 06, · The research reveals that, in reptiles, the penis grows from the tissues that will become hind legs (or in snakes, used to become legs), so two penises form. But in mammals and birds the penis comes from tissue that will eventually become a tail, so only one penis forms.