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18. Here is a representation of the Air Cells viscera and diaphragm upwards: the lungs coin the Lungs, laid open and highly magnified. operate with the diaphragm and abdominal musThe body is formed by Blood, which consists of the cles; or rather, the soul, mind, nerves and musnutritious portions
cles act unitedly, and thence with ease, grace and of our food, and
effect. Observe, the Stomach, Liver, &c. are beis in the form of
low the diaphragm, and are dependent on it, in a very small glob
measure, for their actions.
23. Here is a horizontal view of the Glottis : N, F, are the arytenoid cartilages, connected with the chordæ vocales, (vocal cords, or ligaments,) T, V, stretching across from the top of the arytenoid to the point of the thyroid cartilage: these cords can be elongated, and enlarged to produce lower sounds, and contracted and diminished for higher ones: and, at the same time, separated from each other, and allowing more condensed air to pass for the former purposes; or brought nearer together, to favor the latter: there are a great many muscles attached to the larynx, to give variety to the modifications of voice in speech and song