During normal quiet breathing, about ml of air moves into and out of the lungs each breath.
a. 250
b. 500
c. 1000
d. 2000

The answer is B. 500

Explanation:

During normal silent breathing, approximately 500 ml of air enters and leaves the lungs at each breath. Remember that the air that enters the lungs, under normal conditions is an involuntary action that the body carries out without the person noticing. An alteration of this, produces a condition of dyspnea, sensation that the patient perceives of drowning.

answer:

i dont know

explanation:

i dont know

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answer:

364 lol