Stallion Anatomy

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Author:
Tiffanymiles90
ID:
251630
Filename:
Stallion Anatomy
Updated:
2013-12-08 14:36:58
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Equine Stallion Anatomy
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Stallion Anatomy
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  1. Name the Reproductive tract of a stallion
    Penis > Accessory Glands > Deferent Duct > Epididymides > Testes
  2. What age doe the testes descend into the scrotum?
    10 - 30 days after birth
  3. Which teste is often larger?
    Left
  4. What does the Tunica Dartos muscle do?
    Rais and lower testicles
  5. Testes maintain temp about ___ degrees lower than body temp
    5
  6. What are the 5 layers of tissue surrounding the testes?
    Tunica Dartos Muscle > Scrotal Fascia > Vaginal Tunica > Tunica Albuginea

  7. What is inside all of the protective layer of the testes?
    Parenchyma
  8. Leydig cells are the site of _____________
    Hormone Production
  9. Seminiferous Tublules are the site of ____________
    Sperm Production
  10. How much sperm is producer per second?
    70,000
  11. What do Sertoli Cells provide?
    Nutrients to developing sperm
  12. What are the 3 regions of the Epididymus?
    • Caput or head
    • Corpus or Body
    • Cauda or tail
  13. Where does the Epididymus lie?
    On top of the Testes

  14. How many days does it take to travel through the epididymus and mature?  What parts are developed?
    • 4 days
    • Head and body
  15. Once Mature the sperm is stored in the _____ until ejaculation
    Cauda
  16. How long can the sperm be stored for?
    7-10 days
  17. What is the passage of sperm?
    Seminiferous tubules > Rete Testes > Efferent Ducts >  Epididymis > Vas Deferens
  18. What are the 3 things the Spermatic Cord does?
    • Suspends testes in the scrotum
    • Passage way for deferent duct, nerves and blood vessels
    • Papinifor Plexus
  19. What muscle lowers and raises the testicles?
    Tunica dartos
  20. What are the three different Accessory Glands?
    • Bulbourethral Gland
    • Vesicular Gland (Seminal Vesicle)
    • Prostate Gland
  21. What do the Accessory Glands do?
    Secrete substances to aid in reproductive process
  22. What does the Bulbourethral Gland do?
    • Secretes clear fluid that flushes urethra of urine, bacteria, and debris prior to ejaculation
    • Lubricates urethra for sperm passage
  23. What does the Vesicular Gland do? (2 glands)
    • Produces the gel portion of the ejaculate
    • Helps plug cervix
  24. What does the Prostate Gland do?
    • Secretes thin, watery substance
    • Contributes to seminal plasma
    • Sperm rich fraction
  25. What is the passage of sperm?
    • Seminiferous tubules - produce and nourish spermatids
    • Rete Testes - Concentrae all spermatids 
    • Efferent Ducts
    • Epididymis _ head > body > tail
    • Vans Deferens - Accessory Glands add fluid
    • Urethra
  26. What are the two types of tissue found in the penis?
    • Corpus Cavernosum - Spongy, erectile tissue
    • Corpus Spongiosum - Nerve endings
  27. What are the Hormones found in the stallion?
    • Corpus Cavernosum - Spongy, erectile tissue
    • Corpus Spongiosum - Nerve endings
  28. What are the hormones found in the stallion?
    • Testosterone
    • GnRH
    • FSH
    • LH
  29. What does GnRH stand for?
    Gonadotropin Releasing Hormone
  30. What does GnRH do?
    Stimulates the release of Gonadotropins
  31. Where is GnRH released from?
    Hypothalamus
  32. What does GnRH target?
    Pituitary Gland
  33. What does FSH stand for?
    Follicle Stimulating Hormone
  34. What does FSH do in?
    Stimulates development of spermatids via Sertoli Cells
  35. What does LH stand for?
    Lutenizing Hormone
  36. What does LH do?
    Stimulates production of testosterone by Leydig Cells
  37. What does Testosterone do?
    Stimulates "stallion" characteristics
  38. Should you wash the penis with cleaners?  Why or Why not?
    No,  you could disturb the Micro Flora (good bacteria) of the penis.  Use only water.
  39. How long does sperm take to develop?
    57 days + 10 days for maturation
  40. What is Spermatogenesis?
    Development and production of sperm
  41. What are the 3 stages of Spermatogenesis?
    • Spermatocytogenesis
    • Meiosis
    • Spermiogenesis

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