External Respiration takes place in the Trachea. When oxygen and co2 "switch" its where they connect and making this external respiration!
I hope this helps you!
Homolgy in the etiology (basis) of the condition in humans and research organisms
A, the cuticle is used for water conservation.
Unconsciousness occurs when the brain shuts down in order to prevent any further damage to it.
Answer:
i labelled the diagram . kindly check the attached file for detail
Explanation: