(a) Spiracle
(b) R is the trachea which is air tube that penetrate the body space and carries oxygen to and carbon (IV) oxide away from tracheoles
(c) - Thin walled to reduce distance for diffusing molecules sine it lacks spiral bands of chitin to make the surface permeable to respiratory gases
- Moist to dissolve respiratory gases
johnmulu answered the question on May 4, 2017 at 05:50
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