Air moves through the respiratory system in a continuous cycle.

Question

A.nose, trachea, bronchioles, alveoli, cells
B.nose, pharynx, alveoli, bronchioles, capillaries
C.trachea, bronchi, pharynx, capillaries, cells
D.trachea, bronchioles, bronchi, alveoli, pharynx

 

I think it is C. but im not sure please help.

Answer 1

The pharynx would need to come first in order for C to be correct.

B is also incorrect. Air flows through the bronchioles, then the alveoli, and finally into or out of the capillaries where gas exchange can occur with cells.

 

A is the only option that correctly describes the path of air through the respiratory system in the correct sequence.

 

The complete flow of air would be: Nose>pharynx>trachea>bronchi>bronchioles>alveoli>gas exchange with cells and then back out.

Answer 2

In order for air to move through the system in your body, you need to take in air.  We take in air by inhaling it.  This is done by the nose.  So we only have choice A and B to choose between.  Then once it enters the body through the nose, it goes down your throat through the pharynx, then through different parts in the lungs. 

 

The only choice that shows this order is B.