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Samenvatting Chordata, vertebraten HD 34 Campbell Biology $7.05   Add to cart

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Samenvatting Chordata, vertebraten HD 34 Campbell Biology

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Samenvatting Chordata en vertebraten

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  • 34
  • October 30, 2020
  • 12
  • 2020/2021
  • Summary
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Samenvatting chordata en vertebraten


Criteria voor indeling:
• Weefsels: Geen echte weefsels, vs weefsels
afkomstig van 2 of 3 kiembladen.
• Radiale vs Bilaterale symmetrie Cnidaria
radiaal, ´hogere´ phyla zijn bilateraal
symmetrisch.
• Lichaamsholte (Coeloom: a-, pseudo- &
coelomata)
• Protostomia vs Deuterostomia




Protostomia Deuterostomia
Type klieving Spiraal / Determinatief Radiaal /
Niet-determinatief
Type coeloomvorming Splijting Vouwing
Blastoporus wordt Mond Anus




Omkering organen



DPP & BMP (transforming growth factors) blokkeren
neuronvorming. Sog & chordin komen resp. ventraal
(arthropod) en dorsaal (tetrapod) tot expressie en leiden, via
deblokkering, tot vorming van zenuwstreng ventraal of
dorsaal

, Echinodermate (stekelhuidigen)

 Bilateraal sym? Alleen de larvale stadium
 Sessiel of langzaam bewegend
 Endoskelet van calciumplaatjes
 Stekels ter bescherming
 Symmetrie:
 Larve: bilateraal
 Adult: secundair “radiair”
 Watervaatstelsel en buisvoetjes:
 Voortbeweging
 Voedselverwerving
 Gaswisseling
 Voortplanting:
 (a)seksueel : gonaden met spermacellen of eicellen die geloosd worden in zee

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