Avian Male anatomy Flashcards
what is the functions of the scrotum
-protects and supports the testes
_____-dual chambered pouch
scrotum
what does each half of the scrotum contain
-testis, epididymis, distal spermaticord
epididymis:
- Head, body, tail
- maturation annd storage of spermatoza
Spermaticord: is made up of
composed of ductus deferens, testicular VAN, and mesoductus deferens+mesorchium
what are the layers of the scrotum
- Outer skin with tunica dartos m.
- spermatic fascia
- vaginal tunic
what layers make up the vaginal tunic
- parietal
- visceral-vaginal cavity
what is the blood supply to the scrotum
-External pudendal A
what muscle becomes the cremaster M.
-the caudal slip of the internal abdominal oblique M.
what it the main function of the Cremaster M
-pull testis closer to body
what is the function of the testicular vein
thermoregulation
what are the layers surrounding the testis
- inner most: tunica albuginea
- visceral vaginal tunic
- Outer: parietal vaginal tunic
What is the decent
the migration of the testies from near the kidneys to the scrotum
what is phase 1 of descent
Extra-abdominal gubernaculum increases in size and dilates the inguinal canal to allow the testis to pass through
what is phase 2 of descent
The gubernaculum regresses and makes room for the testis
Cryptorchidism
- hidden testicle
- when one or both testes did not descend and are retained in the abdominal cavity/inguinal canal
What makes an open castration “open”
- when it goes through the parietal vaginal tunic
- this opens the vaginal cavity to the abdomen
what makes a closed castration “closed”
- when the castration only goes through fascia and not the parietal vaginal tunic
- this does not expose vaginal cavity to open air.