Male Anatomy Flashcards
What are the 5 main parts of the sperms pathway?
- Testis
- Epididymis head/body
- Epididymis tail
- Sex glands
- Penis
Where is sperm stored?
Epididymal tail
What are the 4 main accessory sex gland?
Ampullae
Vesicular
Prostate
Bulbourethral
Which species has a disseminate prostate?
Ram
Which species has a corpus prostate?
Stallion
Which sex gland does the boar lack?
Ampullae
Which sex glands does the tom lack?
Ampullae
Vesicular gland
What is the only sex gland a dog has?
Prostate
What are the 7 structures of the spermatic cord?
- Testicular v.
- Testicular a.
- Testicular n.
- Lymphatics
- Cremaster m.
- Ductus deferens
- Vaginal tunic
What is the temperature of the blood going to/from the body?
39oC
What is the temperature of the blood going to/from the testis?
33oC
What are the 3 parts of the excurrent duct system?
- Efferent ducts
- Epipidymal duct
- Ductus Deferens
What is the liquid, non-cellular portion of semen produced by the sex glands & epididymis?
Seminal plasma
What kind of penises do bulls, boars, & rams have?
Fibroelastic
What kind of penises do stallion & dogs have?
Musculovascular
Which species have a cartilaginous process on their gland penis?
Alpaca
Which species have penile spines?
Toms
What hormone comes from the Hypothalamus tonic centre and triggers the release of FHS & LH?
GnRH
When triggered by GnRH which organ releases FSH & LH?
Anterior lobe of Pituitary
Leydig cells are analougous to what cells in the female?
Theca interna
What hormone do Leydig cells produce?
Testosterone
LH acts upon what cells?
Leydig cells
LH trigger the release of what from Leydig cells?
Testosterone
FSH acts upon what cells?
Sertoli
What does FSH cause at Sertoli cells?
Stimulates spermatogensis
Release of estradiol
What systemic effect does testosterone have?
Negative feedback of GnRH–>prolong LH secretion
Where is testosterone converted to estradiol?
Seminiferous tubules lumen
What effect does Inhibin have at the Sertoli cells?
Suppress FSH
Where does spermatogenesis take place?
Seminiferous tubules(epithelium)
What are the 3 stages of spermatogenesis?
Proliferation(Mitosis)
Meiosis
Differentiation
Which of the 3 stages of spermatogenesis takes part in the basal most part of the seminiferous tubules?
Proliferation(mitosis)
What part of the seminiferous tubules do meiosis & differntiation take place?
Adluminal
What are the 5 stages of a sperms development?
- Spermatogonia
- Primary spermatocytes
- Secondary spermatocytes
- Spermatids
- Spermatozoon
What is another name for the Differentiation phase of spermatogenisis?
Spermiogenisis
What are the 4 phases of the spermiogenisis?
- Golgi phase
- Cap phase
- Acrosomal phase
- Maturation
Which of the 4 phases does acrosomic vesicle formation take place?
A. Golgi phase
B. Cap phase
C. Acrosomal phase
D. Maturation
A. Golgi phase
Which of the 4 phases does acrosomic vesicle spreading over the nucleus take place?
A. Golgi phase
B. Cap phase
C. Acrosomal phase
D. Maturation
B. Cap phase
Which of the 4 phases does nuclear & cytoplasmic elongation take place?
A. Golgi phase
B. Cap phase
C. Acrosomal phase
D. Maturation
C. Acrosomal phase
What are the 3 parts of a spermatozoa’s head?
Nucleus
Acrosome
Postnuclear cap
What are the 3 parts of a spermatozoa’s tail starting at the head and going down?
Middle piece
Principal piece
Terminal piece
Pulse release of which 3 hormones takes place every several hours?
GnRH, LH, Testosterone
T/F: Compared to the others FSH is release in larger pulses of shorter duration.
FALSE!
FSH is released in SMALLER pulses of SHORTER duration
T/F: Spermatozoa are being constantly released from the testes.
True!
Spermatozoa are produced by testes(ie. spermatogeneisis) within _______.
5-9 weeks
