r egulasi sistem reproduksi jantan n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
R egulasi sistem reproduksi jantan PowerPoint Presentation
Download Presentation
R egulasi sistem reproduksi jantan

Loading in 2 Seconds...

play fullscreen
1 / 23

R egulasi sistem reproduksi jantan - PowerPoint PPT Presentation


  • 131 Views
  • Uploaded on

R egulasi sistem reproduksi jantan. 1. Regulasi organ reproduksi jantan : testis, skrotum, epididimis, vas deferent, uretra, dan kelenjar asesoris 2. Struktur pendukung: jaringan saraf dan peredaran darah. Pengaturan di TESTIS. Spermatogenesis Hormonal control.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'R egulasi sistem reproduksi jantan' - millie


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide2

1. Regulasi organ reproduksi jantan:

    • testis,
    • skrotum,
    • epididimis,
    • vas deferent,
    • uretra, dan
    • kelenjar asesoris
  • 2. Struktur pendukung:
    • jaringan saraf dan
    • peredaran darah
pengaturan di testis
Pengaturandi TESTIS
  • Spermatogenesis
  • Hormonal control
produksi spermatozoa
Produksi Spermatozoa
  • Seminiferous tubules
    • Spermatids
    • Spermatocytes
    • Spermatozoa
    • Sertoli cells
  • Interstitial tissue
    • Leydig cells
    • Capillaries
spermatozoa structure and functions
Spermatozoa Structure and Functions
  • Head
    • Acrosome
    • Nucleus
  • Midpiece
    • Centrioles
    • Mitochondria
  • Tail: flagellum
    • Microtubules

Figure 26-10: Sperm structure

fungsi sel sertoli
FungsiselSertoli
  • Nourish healthy cells & phagocytize damaged germ cells
  • Synthesize luminal proteins
  • Maintain tubular fluid
  • Convert androgens to estrogens
the blood testis barrier btb
The blood-testis barrier (BTB)
  • BTB (in rats)  composed:
    • tight junction
    • basal ectoplasmic specialization
    • basal tubulobulbar complex
    • desmosome-like junction, at side-by-side in the seminiferous epithelium
slide10

Tight junctions sebagai tempat komunikasi antar sel

TIGHTJUNCTION

ANCHORING JUNCTION

COMMUNICATING

JUNCTION

Plasma membranes ofadjacent cells

Extracellularmatrix

slide11

The BTB physically  divides the seminiferous epithelium into basal and apical compartments  spermatogenesis

  • The function:
    • Immunological barrier -cell antigens from the systemic circulation,
    • Creates a microenvironment for germ-cell development
slide12

Spermatogenesis  the BTB to permit the preleptotene & leptotene spermatocytes (Late stage VII - VIII of the epithelial cycle)

  • BTB to facilitate germ-cell migration is regulated two cytokines to activated protein kinases:
    • 1. Transforming Growth Factor-beta3 (TGF-beta3)
    • 2. tumor necrosis factor-alpha (TNFalpha)
sel intersisial
SelIntersisial
  • Terletak di antara seminiferous tubules
  • Di jumpai banyak kapiler darah dan populasi sel somatik lainnya
  • Menghasilkan hormone testosteron (Franz von Leydig, 1821-1908, German)
  • Bentuk: cuboidal & in groups of 2-20 cells
  • Testosteron menstimuli perkembangan sek sekunder jantan (rambut & bentuk tubuh)
  • The pituitary hormone ICSH (Interstitial Cell Stimulating Hormone) menstimuli produksi testosteron saat puber
saluran reproduksi
SaluranReproduksi:
  • Rete Testis
    • channels lined with a low cuboidal epithelium, like channels in a river delta
  • Efferent ducts
    • The efferent ducts (7-15 seminiferous tubules )
  • Epididymis
    • Long & extremely coiled single duct
    • Extra testicular organ
  • Ductus Deferens
    • relatively short & highly coiled ducts
    • pseudostratified columnar epithelium
kelenjar asesoris
KelenjarAsesoris
  • Prostate gland
    • radially around the urethra (upper right)
    • 20% total volume semen
  • Seminal Vesicle
    • 60 % total volume semen
  • Bulbourethral gland (Cowper gland)
  • Ejaculat
    • pH 7,2-8,2
penis
Penis
  • Tersusunatas:
  • Korpusspongiosum: terletakdisekitaruretra, penuhkapilerdarah
  • Korpuscavernosum: terletakdibagian dorsal, terdapatpembuluhdarahbesar
pengaturan seresi protein epididymis
Pengaturanseresi protein epididymis

Sintesis protein di epididymis: tergantung konsentrasi androgen dan kepekatan cairan

Sintesis hormon steroid: 5-alpha dihydroxytestosterone (DHT), disekresikan di sitoplasma bagian caput, corpus, & cauda

Secretion of epididymal segments → epithelium epididymal

In rats, the proximal & in the distal epididymis →

* the proximal epididymis → 27 & 29-kD

* the distal epididymis → 32-40 kD

slide23

TERIMA KASIH

ATAS PERHATIANNYA