Just before each crus
A penis (plural ''penises'' or ''penes'' () is the primary sexual organ that male animals use to inseminate females (or hermaphrodites) during copulation. Such organs occur in many animals, both vertebrate and invertebrate, but males ...
meets its fellow, it presents a slight enlargement, which
Georg Ludwig Kobelt
Georg Ludwig Kobelt (March 12, 1804 in Kehl – May 18, 1857) was a German anatomist. He studied medicine at the University of Heidelberg, where he was a student of Friedrich Tiedemann (1781–1861). He received his medical doctorate in 1833, ...
named the bulb of the corpus cavernosum penis. The bulb of penis is also known as the urethral bulb.
The bulb is homologous
In female anatomy, the vestibular bulbs, bulbs of the vestibule or clitoral bulbs are two elongated masses of erectile tissue typically described as being situated on either side of the vaginal opening. They are united to each other in front by a ...
File:Gray1142.png, Male urethra.
File:Gray1158.png, Diagram of the arteries of the penis.
Mammal male reproductive system
Human penis anatomy