MCAT BIO CH. 13 PART 1 Flashcards
What is the role of the scrotum, in males?
Temperature regulation
Why are the testes located outside of the body, in males?
Sperm synthesis must occur at a few degrees below normal body temperature
What are the two roles of the testes, in males?
- Synthesis of sperm
2. Secretion of male sex hormones
What is an example of a male sex hormone, in males?
Androgen
What is the site of spermatogenesis, in males?
Seminiferous tubules
What are the walls of the seminiferous tubules made out of, in males?
Sustentacular cells - Sertoli cells
What is the general role of the sustentacular cells,in males?
Protect and nurture the developing sperm
The tissue between the seminiferous tubules is what, in males?
Testicular interstitium
What are interstitial cells and where are they found, in males?
Response for androgen synthesis and coated in testiular interstitium
What are Leydig cells, in males?
Interstitial cells
What are interstitial cells responsible for, in males?
For androgen (testosterone) synthesis
What does the seminiferous tubules empty into, in males?
The epididymis
What is the epididymis and where is it located, in males?
Located on the posterior of each testicle
What does the epididymis empty into, in males?
The ductus deferens
What is the ductus deference and what does it turn into, in males?
Vas deferens; leads to the urethra
To get to the urethra, the ductus deferens leaves what, in males?
Leaves the scrotum and enters the inguinal canal
What is the inguinal canal, in males?
The inguinal canal is a gunnel that travels along the body wall toward the crest of the hip bone
How many inguinal canal is there, in males?
Two; left and right
From the inguinal canal, the ductus deferens enters, in males?
Enters the pelvic cavity
What does the pelvic cavity join into and to form what, in males?
Joins the duct of the seminal vesicle to form the ejaculatory duct
What does the ejaculatory duct join from both sides of the body, in males?
The urethra
What is the seminal vesicles located, in males?
Posterior surface of the bladder
What do the seminal vesicle secrete and where, in males?
60% of the total volume of the semen into the ejaculatory duct
What glands produces semen, in males?
Seminal vesicles, prostate, and the bulbourethral glands