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Respiratory System (Locations of UPPER and LOWER Respiratory Tract (Nasal…
Respiratory System
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Mechanisms of Breathing
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enter and exit the lungs: for gas exchange to occur, air must be able to
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intercostals
diaphragm: the what and what are the muscle of respiration that help air move in and out by changing the pressure of the gases insude the lungs
what is the rib cage like during exhalation? the rib cage is lower. intercostals relax and the ribs fall
what is the shape of the diaphragm during exhalation? the diaphragm is dome shaped. when relaxed it forms a dome
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what happens to the rib cage during inhalation? ---------the rib cage is lifted. intercostals contract to lift the rib cage
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is effort required during inhalation?--yes, effort is required
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exhalation:
the intercostal muscles, holding up the ribcage what which allows the ribcage to What and this what the volume of the lungs
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exhalation:
the diaphragm what which allows it to form a what that pushes up the lungs which what the volume of the lungs
inhalation:
during inhalation, the intercostal muscles what which causes the rib cage to what and this what the volume of the lungs
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inhalation:
the diaphragm what which causes it to what which pulls the lungs downward to what the volume of the lungs
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increasing and decreasing lung volume is what changes what?
--the pressure of the gases within the lungs
lowers
downwards: normal exhalation involved a relaxation of the respiratory muscles, however, forced exhalation requires that the chest cavity compresses even more to decrease lung volume. the only way for that to happen is if the rib cage not only what, but that it pulled what and inwards even further to squeeze in the chest
LUNG CAPACITY TERMS
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RV= Residual Volume (amount of gas remaining in the lungs after a maximal expiration). normally makes up 20% of total lung capacity.
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TV: the TIDAL VOLUME (the amount of gas an individual inspires of expires during normal quiet breathing (7-8%of TLC)).
IRV: Inspiratory Reserve Volume: (that amount of gas that an individual can inhale above a tidal inspiration (60% of TLC)).
ERV: Epiratory Reserve Volume (the amount of gas that an individual can exhale beyond a title expiration (normally 20% of TLC)).
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