How does the human respiratory system brings air/oxygen from the environment into the blood (also known as inhaling!) Question options:

Air enters through your alveoli. It travels through the pharynx and trachea to the bronchi. In the mouth, air enters the lungs where oxygen is transferred into the bloodstream.

Air enters through your nose and mouth. It travels through the pharynx and trachea to the bronchi. In the lungs, air enters the alveoli where oxygen is transferred into the bloodstream.

Air enters through your lungs. It travels through the pharynx and trachea to the bronchi. In the mouth, air enters the alveoli where oxygen is transferred into the bloodstream.

Air enters through your nose and mouth. It travels through the alveoli. In the lungs, air enters the pharynx and trachea to the bronchi where oxygen is transferred into the bloodstream.