glottis

• But the glottis is always opened when the chest is dilated at each inspiration. —  The Life and Letters of Thomas Henry Huxley V.1
• We can thus, as I infer from Professor Owen's interesting description of these parts, understand the strange fact that every particle of food and drink which we swallow has to pass over the orifice of the trachea, with some risk of falling into the lungs, notwithstanding the beautiful contrivance by which the glottis is closed. —  On the Origin of Species by Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life. (2nd edition)
• The vocal bands, then, lie opposite each other, on a level, raised a little in front, and with a narrow slit between, called the glottis The muscles controlling the action of the vocal bands, and which regulate the mechanism producing sound, are of three groups, viz., abductors (drawing-apart muscles), adductors (drawing-together muscles), and tensors The abductors act to keep the bands apart during respiration, while the function of the adductors and tensors is to bring the bands into position for speech or singing. —  The Child-Voice in Singing treated from a physiological and a practical standpoint and especially adapted to schools and boy choirs
• In this way you will avoid the stroke of the glottis which is caused by the sudden and uncontrolled emission of the accumulated breath. —  Caruso and Tetrazzini on the Art of Singing
• When coughing, swallowing, vomiting, holding the breath tightly, etc., these folds of mucous membrane close over the true bands, often completely, and thus shut up for the moment the whole of that space between the bands known as the glottis, or glottic chink, to which reference was made in a previous chapter as the space through which the air finally gains access to the lungs The true vocal cords (which, because of having some breadth and being rather flat, are better termed vocal bands) are composed largely of elastic tissue_. —  Voice Production in Singing and Speaking Based on Scientific Principles (Fourth Edition, Revised and Enlarged)

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