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Samenvatting Korte tijdlijn embryologie en embryologie van hoofd en hals eerste bachelor tandheelkunde (prof. Voet)

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Korte tijdlijn met alle embryonale ontwikkelingen opgesomd per dag van de ontwikkeling, ter ondersteuning bij de samenvatting voor embryologie.

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December 28, 2025
Number of pages
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Written in
2024/2025
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Tijdlijn embryologie
Week 1: 1-7

 Dag 1 -> start klieivingsdelingen: 2 cellen
 Dag 4 -> morula-stadium: oöcyt in de uterus
 Dag 5 -> Blastocyst
 Dag 6 -> Hatching: geheel met trofoblast gaat uit zona pellucida en in de uterus
 Dag 7 -> Implantatie
o Syncytiotrofoblast vormt
o Cytotrofoblast vormt
o Epiblast en hypoblast vormen (<- ICM)


 Embryo ontvangt voedingsstoffen + elimineert afval via diffusie



Week 2: 8-14

 Dag 8 -> ontstaan amnionholte
 Dag 9 ->
o embryo zit volledig in endometrium
o Syncytiotrofoblast zit volledig rond embryo
o Ontstaan trofoblastische lakunae
o Kortstondig ontstaan coagulatie plug
o Ontstaan membraan van Heuser
 Dag 10 ->
o Anastomose; maternaal bloed in trofoblastische lakunae
o Start vorming uteroplacentaal circulatiesysteem
o Primaire dooierzakholte gevormd
o Extra-embryonaal mesoderm (EEM) gevormd
 Dag 11 -> EEM volledig rond embryo
 Dag 12 ->
o Ontstaan Chorionholte
o Primaire choreonaire stamvillus
o Primaire bloedvaatjes sluiten aan op het ontwikkelende hart
 Dag 13 ->
o Primitieve dooierzak wordt verdreven; aanleiding tot secundaire dooierzak
o Amnion en chorion gevormd
 Dag 15 ->
o Secundaire dooierzak (holte) gevormd
o Nog restanten van de primaire dooierzak
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