Answer: Spiracles.
- A Spiracles
- B Stomata
- C Ostia
- D Nephridiopores
Correct answer: A. Spiracles
Explanation: Spiracles are small openings along the body surface of the cockroach through which air enters and leaves the tracheal respiratory system.
The four basic animal tissue types and their core functions: epithelial (covering/lining), connective (support and transport), muscular (movement), and neural (signal conduction).
Concept context
The four basic animal tissue types (epithelial, connective, muscular, neural) and the cockroach as a model organism for organ-system level organisation.