Biology, 22.11.2019 21:31 kalebbenton15
Asthma narrows airways to the lungs and in the lungs by contraction of muscles around the air passages, swelling of the airway lining, and build-up of excessive mucus. because of this, asthma makes both the and systems work harder to deliver oxygen to the cells throughout the body.
a) respiratory; nervous
b) respiratory; digestive
c) respiratory; circulatory
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