Three laryngoscopic view of the superior aperture of the larynx and surrounding parts. Labels: A, the glottis during the emission of a high note in singing; B, in easy and quite inhalation of air; C, in the state of widest possible dilation, as in inhaling a very deep breath. The diagrams A’, B’, and C’, show in horizontal sections of the glottis in position of the vocal ligaments and arytenoid cartilages in the three several states represented in the other figures. In all the figures, so…
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