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anaerobic - without oxygen, aerobic - with oxygen, bronchi - the two major air tubes in the lungs, diaphragm - a large sheet of muscle that separates the lungs from the abdominal cavity, gas exchange - oxygen passes through the capillary wall and into the tissues; carbon dioxide passes from the tissues into the blood, intercostal muscles - muscles between the ribs which raise the ribcage by contracting and lower it by relaxing,

The Respiratory System


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