Respiratory System Flashcards

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1
Q

What do avians have instead of lungs?

A

Air sacs

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2
Q

Why do avians possess air sacs instead of lungs?

A

Allows them to remain light enough for flight

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3
Q

What type of respiratory system do avians have?

A

Double respiratory system

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4
Q

What type of respiratory system do mammals have?

A

Single respiratory system

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