Insect Tracheae Are Kept from Collapsing by

question 6

Multiple Choice

Insect tracheae are kept from collapsing by

• A)having walls of thick chitin.
• B)having spirals of cuticle called taenidia.
• C)being filled with water all the way to the spiracle.
• D)being inflated and under higher air pressure.
• E)being wrapped in insect muscle.

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