كيف يتنفس الضفدع؟

10 يوليو 2013

في الفترة الاولى من حياة الضفدع اي بعد خروجه من البيضة يعيش في الماء و يتنفس

بواسطة الخياشيم، الفترة الثانية تنمو له رئتان يتنفس بهما لكنه يبقى يعتمد في تنفسه

على الجلد تحت الماء علماً أن رئتيه تساعده تحت الماء كذلك عبر تخزين كميات

كبيرة من الهواء.

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أخر المواضيع من قسم : حيوانات

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