I think the answer is man
All cells are not the same because each cells conduct different functions. Each cells have a specific task.
Answer:
the volume of air that is inhaled that does not take part in the gas exchange
Receptors are groups of specialised cells. They detect a change in the environment stimulus. In the nervous system this leads to an electrical impulse being made in response to the stimulus. Sense organs contain groups of receptors that respond to specific stimuli.
