Fig. Model to show mechanism of breathing. The figure shows a plastic bottle whose bottom has been removed. A tube has been passed by making a hole in its lid. To the forked ends of this tube are attached two deflated balloons. The bottle is sealed in such a way that it becomes air-tight. What do balloons in this figure represent?
A) breathing
B) respiration
C) lungs
D) none of these
Correct Answer: C
Solution :
Balloons represent lungs.
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