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kāpēc rāpuļu organismā nonāk ar skābekli bagātākas asinis nekā abiniekiem?????
12, 2006, 15:06kristīne
:-:

    Gan rāpuļiem, gan abiniekiem ir trīskameru sirds, tāpēc organismā nonāk jauktas asinis. Tomēr rāpuļu sirds kambarim ir daļēja šķērssiena, tāpēc no abiem priekškambariem ieplūstošās asinis sajaucas mazāk.
    13, 2006, 20:56purva varde

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