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مناهج عامة
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Biology
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PART-V:Animals: Form and Function
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22. Gas Exchange
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II-The Human Respiratory System
> 6- In mammals, branching tubes convey air to lungs located in the chest cavity
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6- In mammals, branching tubes convey air to lungs located in the chest cavity
yasser
05-08-2025, 11:20 AM
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