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samenvatting leidraad hoofstuk 5 beenvissen $6.13   Add to cart

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samenvatting leidraad hoofstuk 5 beenvissen

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Samenvattende antwoorden op de doestellingen/vragen in de leidraad.

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  • February 14, 2024
  • 2
  • 2022/2023
  • Summary
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V. Osteichthyes

6.1. De origine vn beenvissen

 Actinopterygii
o Spiervinnigen
o Vinnen
 Rij vn basalia die articuleren met schoudergordel
 Rij vn radiale die articuleren met de basalia
 Stevige stralen die aftakken v/d radialen en het web v/d vin ondersteunen
 Basilia en radiale endochondraal bot, lepidotricha dermale oorsprong
o Schedel
 Vroeger volledige dermale dekking
 Nu gereduceerde dermale dekking en meer mobiliteit
 Sarcopterygii
o Straalvinnigen
o Vinnen
 Enkele basalia die articuleert met de schoudergordel
 Mesomeren vormen rechte lijn met radiale vertakkingen aan een of beiden kanten in de vin
en de spieren volgen de botten
o Schedel
 Volledige dermale dekking
 Mobiliteit vn kaken afkomstig vn binnenin de schedel zelf

6.2. Evolutie vn Actinopterygii

 Primitieven
o Nog niet de kenmerkende vinnen
o Aanwezigheid vn enkele dorsale vin
o Amfistyle ophanging
 Teleosten
o Kaken
 Hoge mobiliteit in de skeletelementen
 Dermale tanden in de farynx
 Beide dorsale en ventrale skeletelementen hebben bogen

6.3. Moderne Actinopterygii

 Teleosteans
o Osteoglossomorpha
o Ostarioclupeomorpha
o Euteleostei

6.4. Sacropterygii

 Dipnoans – longvissen
o Verlies vn tanden op dermale beenderen
o Fusie vn palatoquadraat aan het cranium
o Dorsale, caudale en anale vinnen fuseren tot 1 vin die over de gehele einde vn lichaam loopt
o Caudale vin vn heteroceraal nr symmetrisch
o De australische hebben longen aangepast aan het aquatische leven
o Afrikaanse en zuid amerikaanse moeten nog om de zoveel tijd nr lucht gaan happen
o Kunnen overleven in droogte
 Coelacanths
o Eerste dorsale vin gesteund dr een plaat vn bot maar mist een interne lob

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