bulb of penis bulb of penis just before each crus of the penis meets its fellow, it presents a slight enlargement, which georg ludwig kobelt named the bulb of the corpus cavernosum penis. the bulb of penis is also known as the urethral bulb. bulb of penisthe constituent cavernous cylinders of the penis. (bulb labeled at bottom center.)vertical section of bladder, penis, and urethra. (bulb visible at bottom center.)detailsarteryartery of bulb of penisveinvein of bulb of penislymphsuperficial inguinal lymph nodesidentifierslatinbulbus penista98a09.4.01.016ta23685fma19614anatomical terminology the bulb is homologous to the vestibular bulbs in females. additional images male urethra. diagram of the arteries of the penis.