However the mouth cavity and pharynx is not only used in the process of digestion, but also the respiratory system. Air (oxygen) enters the oral cavity, the mouth and nose cavities, and travels down the pharynx and larynx
However the mouth cavity and pharynx is not only used in the process of digestion, but also the respiratory system. Air (oxygen) enters the oral cavity, the mouth and nose cavities, and travels down the pharynx and larynx