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Vertebrate- Pestele de apa dulce

Vertebrate- Pestele de apa dulce. - Crapul -. Mediu de viata. Traieste in lacuri,rauri si balti cu apa dulce. Alcatuirea corpului.

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Vertebrate- Pestele de apa dulce

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  1. Vertebrate-Pestele de apadulce -Crapul-

  2. Mediu de viata • Traieste in lacuri,raurisibalti cu apadulce.

  3. Alcatuireacorpului • Corpuleste format din cap,trunchisicoada.Lanivelulcapului se intalnesc 2 ochifarapleoape,inapoiacarora se aflaurechile.Inspateleacestora se afla de o parte si de alta o deschizaturanumitaopercul.Guraestelipsita de dintiiarbuzelesuntcarnoasesigroase.Parteadorsalaestecolorata in negrusiprezintareflexeverzui.Partilelateralesuntauriiiarceaventralaalbicioasa.Solziisuntorientaticatreparteaposterioarasisuntacoperiti de un strat de mucus secretat de glande.Are 7 perechi de aripidintrecare:unelesuntperechi(pectoralesiventrale) siunelesunteneperechi (dorsala,codalasianala).Innotul in liniedreapta se realizeaza cu ajutorulmusculaturiisiinnotatoareloriarcelpeverticalaastefel:subcoloanavertebrala se afla o veziocagazoasa care cand se umple cu aer reduce densitateacorpuluiastfelincatpestele se poatedeplasa in sus.

  4. Respiratia • Se realizeaza cu ajutorulbranhiilor,bogatvascularizate.

  5. Hranirea • Este un animal omnivor:plante,insecte,oua de broaste etc.

  6. Inmultirea • Se realizeazaprinfecundatieexterna,la care participacelulareproducatoarefemininasiceamasculina.

  7. Sper ca vaplacut!

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