Answer: mucilaginous sheath
Explanation:
Explanation:
it's pretty much a community of any living organism that live and interact with eachother depending on a specific environment
Answer:
Tubules?
Explanation
The trachea, spiracle, and air sac are part of their respiratory system, Howeber, the tubules are what take away the carbon dioxide from their system. Im not sure if they produce the carbon dioixde. But they are a part of what removes the carbon-dioxide from their body.
Its most likely B because its Skeleton is its structure (?)
