Lecture 04/Lab 2: Male Repro Histology (Baekey) Flashcards
fx of septa in testis
divides testis into lobules; allows blood vessels to travel in the interstitial tissue
seminiferous tubules house
developing germ cells
leydig cells secrete what hormone?
testosterone
interstitial/adventitial tissue contains 2 things
leydig cells, blood vessels
what tissue surrounds rete testis?
mediastinum
rete testis
network of randomly anastomized tubules in the mediastinum.
epithelium lining rete testis
simple cuboidal epithelium
Are spermatogonia and primary spermatocyte diploid or haploid?
diploid
Are spermatids diploid or haploid?
haploid
Sperm developmental stages (4)
1) spermatogonium
2) spermatocyte
3) early spermatid
4) late spermatid
fx of sertoli cells
Provide proper microenvironment for developing sperm cells.
- Synthesize Mullerian inhibitory Factory (MIF)
- Form blood-testis barrier through tight junctions
What structure is b/w seminiferous tubules and rete testis?
Straight tubules
efferent ductules fx
connect rete tesis with epididymis
Ductus epididymus fx
Mature/store sperm, absorb fluid and androgen binding protein
Ductus deferens fx
transport sperm from the epididymis in anticipation of ejaculation
epithelium of ductus epididymus
pseudostratified columnar epithelium
defining characteristic of vas deferens histologically
thick tunica muscularis for transporting sperm
Ampullary gland fx
Contributes to seminal fluid. Secretes glycogen and lipid. Located where ductus deferens enters the urethra
epithelium of ampullary glands
columnar epithelium
main fx of accessory glands
produce seminal fluid
3 accessory glands
seminal vesicles, prostate, bulbourethral (Cowper’s), Ampulla in some species
which glands empty into the ductus deferens?
ampullae and vesicular glands
which glands empty into the urethra?
prostate and bulbourethral glands
epithelium of seminal vesicles
pseudostratified columnar
2 parts of prostate
body of prostate (wrapped around pelvic urethra), disseminate portion (embedded in lamina propria/submucosa of pelvic urethra)
what does prostate gland secrete?
proteins and lipids
what does bulbourethral gland secrete?
mucus and glycogen
prostatic portion of urethra location
from bladder to prostate
membranous portion of urethra location
from prostate to bulb of penis
spongiose portion of urethra location
distal to bulb of penis
epithelium of penis
stratified squamous epithelium
corpora cavernosa
paired large bodies of erectile tissue located dorsal to the os penis
os penis
bone between the urethra and corpora cavernosa
corpus spongiosum
small medial body of erectile tissue surrounding the urethra
retractor penis
bundle of smooth muscle ventral to the urethra and corpus spongiosum
epithelium that lines urethra
transitional epithelium
erection
relaxation of smooth muscle in the helicine arteries, leading to increased blood flow into cavernous tissue, compressing vein and reducing outflow
fibroelastic vs. musculocavernous penis **
fibroelastic has less complex/vascular corpus cavernosum and no bulbospongiosus or retractor penis. Fibroelastic penis elongates but does not increase in diamter when erect
Which species has fibroelastic penis?
bull
Which species has musculocavernous penis?
stallion
