Spiracles in cockroach are equivalent to which structure in human? A Nostril B Nasal cavity C Trachea D Alveoli
Therefore, the structure of man that is similar to the spiracle of the cockroach is the nostrils. Oxygenated air enters through the spiracle of cockroach and in man the oxygenated air enters through nostrils. Therefore the correct answer is option A. Nostrils.
