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Question
Gaseous exchange in birds occurs in
Gaseous exchange in birds occurs in
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Solution
The correct option is B Air sacs
Birds have lungs, but they also have air sacs. Depending upon the species, the bird has seven or nine air sacs. The air sacs of birds extend into the humerus (the bone between the shoulder and elbow), the femur (the thigh bone), the vertebrae and even the skull.
So the correct answer is 'Air sacs'.
Birds have lungs, but they also have air sacs. Depending upon the species, the bird has seven or nine air sacs. The air sacs of birds extend into the humerus (the bone between the shoulder and elbow), the femur (the thigh bone), the vertebrae and even the skull.
So the correct answer is 'Air sacs'.
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