L32 Male Reproductive Organs Flashcards
The male peritoneum forms the roof of what space?
Retropubic (retzius) space
Potential space anterior to the bladder
Which part of the bladder is in contact with the male peritoneum?
Fundus.
The peritoneum descends on anterior abdo- wall to the pubic symphysis.
Passes over the fundus of the bladder and forms the rectovesical pouch to the posterior of the bladder.
What are the three segments of the male urethra?
1) Prostatic urethra (in the prostate)
2) Membranous urethra (between prostate and penis)
3) Spongy (penile) urethra (in penis)
What structure suspends the testes in the scrotum?
Spermatic cord
What is the initial route of sperm before ejaculation?
1) Produced in the seminiferous tubules of testes
2) Drain in rete testis channels via the tubuli recti (short, straight tubes)
3) Efferent ductules drain from the rete testis to the epididymis
4) The epididymis merges into the ductus (vas) deferens
What two muscles control the scrotum?
Dartos and cremaster muscles.
They contract to elevate the testes.
What is the role of ductus (vas) deferens?
Convey sperm from the epididymis to the ejaculatory duct.
Final dilated part of the tube is known as the ampulla.
Ampullae join with the outlet of the seminal vesicles to form ejactulatory ducts, which open into the prostatic urethra.
Severing the ductus deferens is known as __?__
Vasectomy
What are the seminal vesicles?
Two knobbly structures that lie between the fundus of the bladder and the rectum.
They do not store sperm.
The secrete an alkaline fructose-rich fluid as an energy source for sperm.
Ducts join the ductus deferens to form the ejaculatory ducts that open into the prostatic urethra,
What is the role of the alkaline fructose-rich fluid secreted by the seminal vesicles?
Alkaline: protects from acidity of vagina
Fructose-rich: energy source for sperm
What is produced by the prostate?
Milky fluid that aids sperm motility
Citrate for sperm energy
Prostate serum antigen (PSA) to reduce viscosity of semen
True or false: All the structures that lead into the prostate are paired and converge here.
True
Where do the ejaculatory ducts enter the prostate?
At the seminal colliculus, which is the elevated part of the urethral crest and where the prostatic utricle opens
Which vessel provides the maid blood supply to the prostate?
Inferior vesical artery (a branch of the internal iliac artery)
The prostate is homologous to which gland in females?
Skene’s gland
