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Samenvatting hoofdstuk 4: de ontwikkeling van het spijsverteringsstelsel

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(Behaalde score: 18/20) Deze samenvatting bevat alle info uit de acco cursus gecombineerd met extra info en foto's uit de slides.

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Uploaded on
February 6, 2025
Number of pages
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Written in
2023/2024
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Hoofdstuk 4: De ontwikkeling van het spijsverteringsstelsel .................................................................. 2
4.6.1 Inleiding .................................................................................................................................. 2
4.6.2 De faryngale darm .................................................................................................................. 3
4.6.3 De voordarm ........................................................................................................................... 7
4.6.4 De middendarm ...................................................................................................................... 8
4.6.5 De einddarm ......................................................................................................................... 11




1

, Hoofdstuk 4: De ontwikkeling van het spijsverteringsstelsel

4.6.1 Inleiding


 De buis v/h spijsverteringsstelsel ontstaat wanneer het ENDODERMALE kiemblad door de
vorming v/d begrenzende plooien omgevormd wordt tot de primi eve darm
o Het ENDODERM vormt de epitheliale bekleding v/d tractus diges vus
o Ontwikkelen zich ook uit ENDODERM:
 De lever
 de pancreas
o A oms g v/h viscerale blad v/h MESODERM = splanchopleura
 De spieren & bindweefsel v/d tractus diges vus
 het peritoneum rond de wand van de tractus
o De primi eve darm is afgesloten door:
 Craniaal: de oro of buccofaryngale membraan
 Caudaal: de cloacale membraan
o Via de ductus vitellinus staat primi eve darm in verbinding met de dooierzak
o Aan de caudale zijde vertoont de primi eve darm een blind eindigende uitstulping:
 de allantois  ligt in de hechtsteel




 In dit hoofdstuk wordt de ontwikkeling v/d primi eve darm zeer beknopt voorgesteld

 De buis van de primi eve darm wordt in 4 zones onderverdeeld:
1) de faryngale darm
(vanaf de faryngale membraan tot aan de tracheobronchiale diver kel)
2) de voordarm
(vanaf tracheobronchiale diver kel tem de leveraanleg)
3) de middendarm
tot aan de overgang tussen het proximale 2/3 en het distale 1/3 van het colon
transversum)
4) de einddarm
(tot aan de cloacale membraan; tot anus )


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