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Samenvatting Hoofdstuk 11 Biosfeer dieren $3.78   Add to cart

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Samenvatting Hoofdstuk 11 Biosfeer dieren

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Dit is een samenvatting van de slides en de geziene leerstof in de les Biosfeer dieren, gegeven door Wim Bert. De extra uitleg in het handboek is hier NIET in verwerkt

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  • January 28, 2024
  • 4
  • 2023/2024
  • Summary
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Hoofdstuk 11: Annelida & co
Fylum Annelida
= ringwormen

 15.000 soorten
 Gesegmenteerd lichaam
 In marien, zoetwater en vochtig milieu
 Ecologisch belangrijk
 Gefossiliseerde gangen (trace fossielen) 540-560 milj.
 wijzen op de opkomst Annelida

Metamerisatie
 Seriële herhaling van gelijkaardige unitsvan ectodermale EN mesodermale oorsprong
 Metamerisatie of segmentatie komt ook voor in de Arthropoda & Chordata
 Dient voor beweging en veiligheid
 Spieren trekken samen = organisme beweegt voort
()||()||…




Anatomie
 Spijverteringsstelsel: mondopening - pharynx-
oesophagus-(krop) – maag – darm - anus
 zenuwstelsel: cerebrale ganglia –
subfaryngeaal ganglion- ventrale zenuwstelsel
 bloedvatenstelsel: gesloten, bloed met
hemoglobine, dorsale bloedvat gespierd
 ademhalingsstelsel: huidademhaling
 bij Poluchaeta: netwerk van bloedvaten
vormen de kieuwfunctie
 Excretiestelsel: nefridia, bestaat uit
nephridioductus en nephridioporus
 nephridioductus wordt omgeven door een
capillair netwerk
 Excretiestoffen worden afgegeven vanuit
de bloedsomploot en resorptie van nuttige
stoffen

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