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kāpēc rāpuļu organismā nonāk ar skābekli bagātākas asinis nekā abiniekiem?????

12, 2006, 15:06

kristīne

:-:

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, 20:56

purva varde

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