Pathways to Pregnancy and Parturition, 2nd Ed: Figure 3-22

 BG = Bulbus Glandis
CC = Corpus Cavernosum
CP = Cartilaginous Process
CS = Corpus Spongiosum
FCE = Fibrocartilaginous
          end of Os Penis
GP = Glans Penis
OP  = Os Penis
PLG = Pars longa glandis
PS = Penile Spines
PU = Penile Urethra
RPM = Retractor Penis
          Muscle
TA = Tunica Albuginea