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Study Companion

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QUESTION
Q166) Common feature of human and insect trachea is .... [ AFMC 1994 ]

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correct

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A tracheal tube in insects develops as the invagination of the ectoderm. To prevent its collapse under pressure, a thin reinforcing wire' of cuticle called the taenidia winds spirally through. it's membranous wall.

The trachea is composed of about 20 rings of tough cartilage
Answer : (b)