Air from the outside environment first enters the realities system through what

Air from the outside environment first enters the respiratory system through the nostrils. and then after the nostrils it will actually go through your mouth, and then it will go to your pharynx, and then go through the trace and then the larynx, after that it will pass by the bronchial tubes and then the right lung and last is the left lung.

respiratory system! hope this helps!!

answer; /// ( shock.(b) head injuries.(c) drug

answer; all of the above;