Male Reproductive System Flashcards
Components of Male reproductive system
List the major components of the male reproductive system. Give the embryonic origins of the system.
Testis= site of spermatogenesis
- composed of seminiferous tubules with Sertoli cells
- surrounded by tunicae vaginalis and tunica albuginea (white)
Epididymis= long coiled tubule with head, body and tail
- feeds into the ducus deferens
Ductus deferens= CUT IT IN VASECTOMY
Trace the formation of a sperm cell from its origin as a spermatogonium to a Spermatozoon/spermatozoa found in the seminiferous tubule lumen.
- sperm is formed in seminerferous tubules
- through strait tubule into the rete testis
- efferent ductules into the ductus Vas deferens
- then through pelvic urethra and out through penule urethra
List all secretions of Leydig (interstitial cells) and Sertoli cells.
Part of testis
Sertoli cells- in seminiferous tubules
- secrete:
- testicular fluid-support, protect and nourish spermatogenic cells
- ABP- part of germ cell differentiation
- AMH- prevent mullerian duct
- Inhibin- supress secretion of FSH
Interstitial cells (leydig)- in interstitium
- secrete testosterone
Describe the adluminal and basal compartments of the seminiferous tubule and the blood-testis barrier.
Sertoli cells form tight junctions with one another and divide seminiferous epithelium into two compartments
- basal compartment- spermatagonia reside here
- adluminal compartment- once division starts, early spermatocytes pass through barrier into this compartment. (Isolated from blood!)
Trace the transportation of the sperm from the seminiferous tubules to the penile urethra
List the possible accessory sex glands among the domestic species and in particular define the microanatomy of the prostate gland
Accessory sex glands
- Bulbourethral Glands
- mucous secretions lubricate urethra
- Prostate Gland
- lined by simple cuboidal columnar epithelium
- branched tubuloalveolar gland
- surrounded by fibroelastic capsule
- Ampullary Glands
- Vesicular Glands
Define and recognize in tissue sections: Sertoli cell, spermatogonia, spermatozoa, seminiferous tubule, tubuli recti, rete testis, efferent ducts, ductus epididymis, ductus deferens, prostate.
x
Identify and define
Seminiferous tubules
- compose bulk of the testis
- lined by spermatogenic epithelium
- leydig cells are between tubules
Define and identify
Sertoli Cells
- can be identified by unique nucleus (paler)
- no sperm production without them
- blood testes barrier
- support protect and nourish spermatogenic cells
- also protect spermatids from immune system
- RELEASE ABP and INHIBIN and AMH
Define and identify
Cells of Leydig
- between seminiferous tubules
- very acidophyllic
- secrete TESTOSTERONE
- controlled by intersistial cells stimulating hormone (ICSH)
Define and identify
Epididymis
- long very coiled tubule connecting testis to Ductus deferens
Define and Identify
Ductus Deferens
- major component in vastectomy
- lined by pseudostratified columnar ciliated eplithelium
- terminal end=ejaculatory duct
- male accessory gland= ampulla
Penises
penisis
Engorging = horses, primates
- corpera cavernosa are on each side of it and engorge
- corpus spongiosum is erectile tissue surrounding urethra
Fibroelastic= ruminants
Define and identify
Prostate gland
- surrounded by fibroelastic capsule
- lined by simple cuboidal epithelium
- Corpora amylacea= prostatic concretions that increase with age
Define and Identify
Rete testis
- lined by simple squamous/cuboidal epithelium
- seminiferous tubules terminate in tubuli recti which empty in the channels of the rete testis
- rete testis empty into efferent ductules which lead to the epididymal ducts
Identify
Identify and Explain
Seminiferous tubules empty into tubuli recti which go to rete testis.
Rete testis connects with efferent ductules in the head of epididymis.
Efferent ductules empty into the epididymal ducts which empty into the ductus deferens.
