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Anatomy and Physiology 2211K. Lecture Four. Slide 2 –Upper and lower respiratory tract. Slide 3 - Nose. Slide 4 – Nasal septum. Slide 5 – Perpendicular plate and the vomer bone. Slide 6 – Nasal bone. Slide 7 – Frontal process of the maxillae.
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Anatomy and Physiology 2211K Lecture Four
Slide 23 – Nasal mucosa (pseudostratified ciliated epithelium)
Slide 27 – Muscles of voice - lateral view Thyroarytenoid muscle Lateral cricoarytenoid Posterior cricoarytenoid Cricothyroid
Slide 28 – Muscles of the larynx – caudal view Posterior cricoarytenoid Transverse arytenoid Lateral cricoarytenoid Thyroarytenoid muscle Hyoid bone
Slide 29 - Phonation Phonation is defined as thevibration or sounds produced when air moved pass the vocal folds during exhalation • The length of the vocal cords can be changed by relaxing or contracting the surrounding skeletal muscles • High pitch voices are caused by the closing of the glottis whereby caused by the contraction of the muscles of the larynx • The smaller the diameter of the glottis the higher the resonant frequency (vibration caused by expelling air from the lungs) and thereby the higher the pitch • Lower pitch voice is caused by opening the glottis which is caused by the relaxation of the muscle of the larynx • The larger the diameter of the glottis the lower the resonant frequency (vibration caused by expelling air from the lungs) and thereby the lower the pitch