anfíbios
TRANSCRIPT
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Anfíbios
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Anfíbios
• Adaptações ao ambiente terrestre
- Patas- Pulmões- Pálpebras e glândulas
lacrimais- Ouvido médio
• Restrições ao ambiente terrestre
- Pele rica em glândulas mucosas e pobre em queratina o que a torna permeável
- A maioria depende da água para a reprodução
- Pulmões ineficientes- Ovos sem casca
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Anfíbios
• Outras características:
- Alguns apresentam cordas vocais
- Podem apresentar língua viscosa que prende insetos
- Podem apresentar glândulas de veneno na pele
• Ordem Gymnophiona- Corpo vermiforme
sem patas- Fecundação interna,
macho com órgão copulados
- Cecílias ou cobras cegas
- Larvas com brânquias
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Anfíbios - Ordens
• Ordem Anura- não possuem cauda- Saltadores- Maioria com
fecundação externa- Sapos, rãs e
pererecas
• Ordem urodela
- Com cauda e pata- Maioria com
fecundação interna sem órgão copulador
- Podem sofrer neotenia ( axolote)
- salamandras
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