Chronic obstructive pulmonary disease (COPD) is the fourth leading cause of death in the United States. This disease primarily affects
A) the respiratory passageways and alveoli of the lungs.
B) the esophagus, stomach, and other portions of the digestive tract.
C) the mouth, nose, and pharynx in the upper respiratory tract.
D) the heart, blood, and blood vessels throughout the body.
A
Environmental & Atmospheric Sciences
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