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Samenvatting Anatomie & Fysiologie: Voortplantingsstelsel

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samenvatting van onderdeel voortplantingsstelsel van anatomie en fysiologie

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Uploaded on
April 12, 2023
Number of pages
18
Written in
2022/2023
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Summary

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Het voortplantingsstelsel




1

,Enkele begrippen
 Gameten 23 chromosomen (haploïd)
o Voortplantingscellen
o Bij dieren spermacel en eicel
 Bevruchting 2 x 23 chromosomen (diploïd)
o Versmelting van mannelijke en vrouwelijke gameet
 Gonaden
o Voortplantingsorganen
o Bij mensen testes en ovaria
 Zygote 46 chromosomen
o Bevruchte eicel
o Alle cellen die hieruit voortkomen vormen het menselijke lichaam en hebben
hetzelfde erfelijke materiaal




2

, Mannelijke geslachtsorganen
Overzicht
 Testes
 Epididymis – zaadleider – urethra
 Accessoire klieren
 Zaadvocht
 Penis
 Hormonen




Testes
 Testikels of zaadballen primaire geslachtskenmerken
 Gevormd in het lieskanaal
 Voor de geboorte naar buiten
 Hangen op in scrotum (glad spierweefsel)
o 2 scrotumholten
 Bevatten elk 1 testikel
o Dunne huidlaag met glad spierweefsel (tunica dartos)
o Conractie tunica dartos geeft gerimpeld uitzicht
o Onder de lederhuid m. cremaster
 Samentrekken testes korter bij lichaam
 Ontspannen testes iets lager, lagere temperatuur
 Doel testes op 1,1°C lager dan de lichaamstemperatuur voor
spermatogenese
 Cremaster reflex aan binnenzijde van man scrotum naar boven getrokken
 Torsio testis arterie is afgesnoerd doordat de teelbal gedraaid zit hevige pijn



3

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