Histology - Male Flashcards
testis is surround by? which is also surrounded by?
Tunica albuginea (CT) tunica vaginalis
septa from tunica albuginea divides testis into?
250 incomplete compartments/lobule
how are the seminiferous tubules within testis connected in different compartments?
via rete testis»efferent ductules» epididymis»vas deferens»urethra
each lobule has how many seminiferous tubules? length?
1-4 convoluted (50cm)
Tunica propria in seminiferous tubules lacks? contains instead?
lacks fibroblasts
contains smooth muscles
what cells are within the tunica propria of seminiferous tubules? purpose?
Leydig Cells for testosterone production
seminiferous tubules has what kind of epithelium?
stratified epithelium full of stem cell spermatogonium
where are sertoli cells?
support cells that are between and inter-digitating between the spermatogonium developing
what is located at base of seminiferous tubules stratified epithelium? purpose?
peritubular (myoid) cells of the tunica propria. peristaltic movement to move sperm
when are Leydig cells active?
first 5 months of life
inactive until puberty
what does the tubuli recti connect?
the seminiferous tubules to the rete testis
what is tubuli recti contain? cell type?
only sertoli cells (simple ciliated cuboidal)
dustus deferens embryonic origins? female equivalent?
mesonephric Wolffian duct
females forms fallopian tubes
around 20 surviving mesonephric tubles form what? what does it connect?
efferent ductules that connect the rete testis to the single epididymis
what are efferent ductules lined with? surrounded by?
ciliated pseudostratified columnar epithelium surrounded by smooth muscle
3 main functions of epididymis?
- mature sperm
- decapacitation (ihibitory factors secreted)
- absorb testicular fluid/debris cleaning
ductus deferens runs into abdo via?
inguinal canal/spermatic cord
ductus deferens enters prostate and becomes?
ejaculatory duct
ductus deferens lined with
ciliated pseudostratified columnar epithelium
ductus deferens muscular?
yes thick smooth muscle coat
ejaculatory duct muscular?
Nope
seminal vesicles secrete:
fructose
prostaglandins
alkaline fluid
how much of semen from seminal vesicles?
50% volume
prostate how many glands?
30-50 tubuloalveolar glands into urethra and prostatic sinuses
describe urethra in prostate?
branching prostatic sinuses
3 glands in prostate:
- main glands drain via long ducts
- submucosal drain into prostatic sinuese
- tiny mucosal glands open into urethra
4 zones of prostate:
- central -surround ejaculatory
- peripheral - surround central
- transitional -surrounds urethra and periurethral zone
- Periurethral zone - adjacent to urethra
describe prostatic epithelium
heterogenous: columnar, cuboidal, psudostratified
describe the septa in the prostate
CT containing abundant smooth muscle
what are prostatic concretions?
normal with aging: accumulation of protein, calcium phosphase, cholesterol and debris
prostate adds what to semen?
- acid phosphatase
- fibrolysin (frees sperm once in cervix)
- coagulating factors (cause ejaculate to clot to help stay in vagina)
three masses of cavernus tissue in penis surrounded by 3 things?
- smooth muscle
- CT
- tunica albuginea (elastic capsule)
parasympathetic stim of penis does what? which Neurotransmitters?
relaxes cavernosal smooth muscle and dilates arteries (via ACh and NO
how does blood stay in erect penis?
cavernous bodies compress veins to restrict it
what is detumescence? how activated?
sympathetic stim restric inflow and contract cavernosal smooth muscle to empty blood
body of clitoris contains?
bilateral cavernous tissue again surrounded by tunica albuginea
where is crus of clitoris
extends inferiorly along pelvis
blubs of clitoris function?
unknown, no male homologue
