BIO 121 Lecture 30: Anat. Ch.24 Review Sheet

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Air becomes warm a bit before entering trachea. What are the major anatomical landmarks that divide the. 3 areas: nasopharynx- the back of the nose; oropharynx- the back of the mouth; Laryngopharynx- entrance to trachea and esophagus: the nasopharynx contains the pharyngeal tonsils and the openings to the auditory tubes, nasopharynx ends at the soft palate/uvula. How is pitch controlled: air passing between the vocal cords creates sound. Pitch depends on the diameter, length and tension in the vocal cords. Children have slender, short vocal folds thus creating a high-pitched sound. At puberty, the vocal cords of males become thicker and longer thus producing a deeper voice than females. Amplification of sound occurs in the sinus cavities. Production of definite sounds depends on movement of the lips, tongue and cheeks: list and describe the major functions of 2 sets of muscles associated with the larynx, intrinsic: regulate tension of the vocal cords.

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