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COMPONENTS AND SUBDIVISIONS OF THE HUMAN RESPIRATORY
SYSTEM
See figure 1-3 for an illustration of the human respiratory system.
a. Components. The components of the human respiratory system consist of
air passageways and two lungs. Air moves from the outside of the body into tiny sacs in
the lungs called alveoli (pronounced al-VE-oh-lie).
Figure 1-3. The human respiratory system.
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