Comparative Penile Anatomy Flashcards
what penis type does the dog, horse and cat have?
musculocavernous penis
what penis type does the bull, ram, buck and boar have?
fibroelastic penis
describe the content of the musculocavernous penis
higher content of erectile tissue
lower content of fibroelastic tissue
describe the content of the fibroelastic penis
lower content of erectile tissue
higher content of fibroelastic tissue
what are the muscles of the penis base?
1) ischiourethralis
2) ischiocavernosus
3) bulbospongiosus
4) retractor penis
where can the fibroelastic tissue and membranous tissue be found?
fibroelastic –> tunica albuginea and trabeculae
membranous –> erectile tissue
what contributes to tying during mating?
bulbis glandis
what makes the male cat penis special?
has keratinized glans spikes
ovulation is induced by the stimulus of the spikes
describe how an erection forms
-results from the positive balance in the blood flow: more blood accumulates in the penis as the venous drainage is interrupted
-constriction by the ischiourethralis and ischiocavernosus near base
-constriction by vestibular bulb, constrictor vestibuli and constrictor vulvae
describe the difference in erection between the musculocaernous penis and the fibroelastic penis
-musculocavernous –> extensive blood filling
-fibroelastic –> extension of the sigmoid flexure
describe the specifics of an erection in a musculocavernous penis
HIGHER blood filling of cavernous and spongy bodies
describe the specifics of an erection in a fibroelastic penis
LOWER blood filling of cavernous and spongy bodies
extension of sigmoid flexure
what is the prepuce?
musculocutaneous shield that covers and protects the penis
what are the retractor and protractor muscles of the prepuce?
retractor: preputial caudalis
protractor: preputial cranialis
what is the blood supply of the prepuce?
external pudendal artery and vein
