MALE GENITAL MUSCLES
The cremaster muscle pulls the testis up against the superficial vaginal ring, particularly in cold weather. The cremaster muscles are responsible for the testes being drawn into the abdominal cavity of the elephant, deer, and rabbit during times other than the breeding season.
A skeletal muscle, the urethralis, is the pelvic continuation of the smooth muscle wall of the urinary bladder. The peristaltic action of this muscle assists in the transport of urine or semen through the pelvic urethra. The bulbospongiosus muscle is a striated muscle continuation of the urethralis. It continues throughout the length of the penis in the horse, but in other animals, it is only present up to a short distance along the penile urethra. The ischiocavernosus muscles pull the penis upward against the floor of the pelvis. The retractor penis muscles pull the flaccid penis back into the prepuce.20.6
Source:
Rana Tanmoy (ed.). Principles of Veterinary Animal Physiology. CRC Press,2026. — 290 p.. 2026
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