Respiration can be done by the nose or the mouth. In both cases, air reaches the trachea and passes through to the lungs.
Learning goals
To show airways in the human body.
To illustrate repiratory movements.
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Respiratory movements (inspiration and expiration) allow the renewall of air in the lungs. Air enters and exits by the respiratory airways: the oral cavity, the nostrils, the trachea and the…