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Samenvatting deel mannelijk geslachtsstelsel $3.21
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Samenvatting deel mannelijk geslachtsstelsel

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  • September 28, 2016
  • 4
  • 2015/2016
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Het mannelijk geslachtsstelsel
1.De geslachtsorganen
° Teelbal (testikel, testis) (Links + rechts)
° Gangensysteem: - Bijbal (epididymis)
- zaadleider= ductus deferens / vas deferens
- ampullae
- zaadblaasjes = vesiculae seminales
- Prostaat voorstanderklier
- Cowperse klier (Glandula bulbo-urethralis)
- Pisbuis (urethra)
- penis

1.1 Teelbal (testis)
° Uitwendig (uitz: konijn)  Optimale spermaproductie
° In balzak (scrotum)
° Positie: diersoortafhankelijk – Horiz: hengst – Vertic: stier, beer, ram
° Grootte en consistentie : zb als maat voor de: - Gezondheid
- Vruchtbaarheid
° Te klein = atrofie (afsterven actief weefsel)
° Te groot = ontsteking
° Histologie  Serosa (buikvlies) = tunica vaginalis
 Bindweefselkapsel = tunica albuginea
 Bindweefselschotten
Parenchym = zaadvormend weefsel
 Tubuli seminiferi (zaadbuisjes) = +- 5km!
° Parenchym  Tubuli contorti (gekronkeld)
- Spermatogoniën
- Sertoli cellen  Ondersteuning + Oestrogenen
- Leydig cellen  Androgenen (testosteron)
 Tubuli recti (rechte)
 Tubuli recti verzamelen tot Ductuli efferentes (afvoerkanaaltjes) monden uit in Bijbal
° Ontwikkeling testis: Voor puberteit alleen bindweefsel
Vanaf puberteit start groei zaadbuisjes

1.2 Bijbal (epididimys)
° Kronkelige buis
° Stier: 30m / Beer: 64m / Hengst: 86 m
° 3 delen: Kop (caput) – Lichaam (corpus) – Staart (cauda)
° Ligging: - OP de testes (hengst)
- ACHTER (stier, beer, ram, reu)

1.3 Balzak (scrotum)
° Bedekt met dunne, klierrijke huid
° Dun behaard
° Spieren helpen scrotum in te trekken of te laten zakken ( Tunica dartos + Musculus cremaster)
° Ter hoogte van de dorsale pool van de testis vertakken de venen zich en vormen de plexus
pampiniformis (lett. : zoals een wijnrank die zich kronkelt omheen een stok) rondom de arterie

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