jmanrules200 jmanrules200

15-12-2017
Biology

contestada

n the human respiratory system, oxygen enters the body through the nose and mouth, travels down through the lungs, and is transferred into the bloodstream (circulatory system) through tiny gas sacs called ________.
A) alveoli
B) bronchi
C) arteries
D) ventricles

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adairhernandez8 adairhernandez8

15-12-2017

n the human respiratory system, oxygen enters the body through the nose and mouth, travels down through the lungs, and is transferred into the bloodstream (circulatory system) through tiny gas sacs called -bronchi-.

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