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ID number:196690
 
Author:
Evaluation:
Published: 09.04.2009.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

Apaļmutnieki
Pārstāvji
Nēģi
Āda
Kaila un gļotaina
Mute
Tai ir piltuvveida piesūcekņa forma, to balsta gredzenveidīgs skrimslis
Zobi
Regvielas zobi ar kuriem pārgrauž ādu un ieurbjas audos.
Skelets
tiem vēl nav pilnībā izveidojies mugurkauls.
Nervu sistēma
Sastāv no galvas un muguras smadzenēm.
Vairošanās orgānu sistēma
Šķirtdzimumiskā,pārvēršanās jeb metamorfoze,
Maņu orgāni
Sānu līnija
Asinsrites sistēma
Slēgta, īsta sirds.…

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