Class-book of physiology : for the use of schools and families : comprising the structure and functions of the organs of man, illustrated by comparative reference to those of inferior animals . s christen this worm a dealli-walch ; Because, like a watch, it always cries click! Then woe be to those in the house who are sick! For sure as a gun they will give up the ghost, If the maggot cries click when it scratches the post: But a kettle of scalding hot water ejected, Infallibly cures the timber affected: The omen is broken, the danger is over, The maggot will die, and the sick will recover. THE
Class-book of physiology : for the use of schools and families : comprising the structure and functions of the organs of man, illustrated by comparative reference to those of inferior animals . s christen this worm a dealli-walch ; Because, like a watch, it always cries click! Then woe be to those in the house who are sick! For sure as a gun they will give up the ghost, If the maggot cries click when it scratches the post: But a kettle of scalding hot water ejected, Infallibly cures the timber affected: The omen is broken, the danger is over, The maggot will die, and the sick will recover. THE VOICE. 235 portion of the respiratory tube. In reptiles, it is at thepoint where the trachea or windpipe opens into the pharynxthat the vibratory apparatus is situated. The sounds pro-duced by this class are very simple, being little else thana hiss. 474. In birds, the situation of the vocal organ is verydifferent. The trachea opens into the pharjmx, as in rep-tiles, by a mere slit, but the most essential organ is at thelower extremity of the trachea, near its division into thebronchi. This apparatus, which seems to be a kind ofdrum, is variously formed in different species. In fig. 65. Eig. 05.—Larynx of a spe- Fig. 66.—Larynx op Rook. Fig. 67.—Vertical oies of Duck. section of the same. a, trachea; b, a kind of bony drum; c, bronchial tubes. is a representation of the larynx of a species of duck;fig. 66 represents the larynx of a rook; and fig. 67 a sec-tion of the same. At a, in each of the above figures, isseen the larynx; at b, a sort of bony drum; and at c, thebronchial tubes. In the most esteemed singing-birds theseparts are much more complicated than in birds not distin-guished for their vocal powers. 475. In man and the mammalia, the vocal organ is situ-ated at the upper part of the windpipe, and is called the Where is it produced in reptiles ? How are the vocal organs situated inbirds? What does the apparatus resemble? In what birds is it most com-plicated? Whe
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectphysiologicalprocess
