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function of the respiratory system
produce the airflow through the larynx that makes speech possible
Fx of the sinus
to make bones of the skull lighter, help produce sound by giving resonance to the voice, to produce mucus to provide additional lubrication for the tissues of the nasal cavity
irregularly shaped air cells that are separated from the orbital cavity by only a thin layer of bone
swings downward and closes off the laryngopharynx so food does not enter the trachea and the lungs
contains connective tissue and organs including the heart and its veins and arteries, the esophagus, trachea, bronchi, the thymus gland and lymph nodes
outer laer of the pleura that lines the wall of the thoracic cavity, covers the diaphragm, and forms the sac containing each lung
airtight area between the layers of the pleural membranes containing a thin layer of fluid
as air is inhaled into the alveoli
O2 immediately passes into the surrounding capillaries and is carried by the erythrocytes to all body cells
a decrease in the total number of alveoli, the enlargement of the remaining alveoli, the progressive destruction of the walls of the remaining alveoli
the accumulation of air in the pleural space causing a pressure imbalance that can make the lung collapse
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