HNFE 2204 Lecture Notes - Lecture 8: Respiratory Tract, Nasal Septum, Vocal Folds

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Respiratory system has 2 parts: lower respiratory system consists of the lungs and respiratory tract, upper respiratory tract contains the nose and pharynx. To supply oxygen to body cells and tissues. To eliminate carbon dioxide from the body. To provide airflow between the upper and lower respiratory tracts through the larynx and vocal cords, making human vocal sounds possible. Inhalation, or inspiration, brings air into the nose or mouth, moves to the pharynx (throat), down into the trachea and into the bronchi and then into the lungs. Pharynx-passage for food from the mouth to the esophagus and also for air the nasopharynx is above the soft palate which is a membranous and muscular fold that separates the nasopharynx from the pharynx. The oropharynx is the next section of the pharynx and this section lies in the back of the mouth and contains the tonsils, which are lymphoid tissue located on either side of the throat.

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