
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1878 Excerpt: ... backwards cannot be altered, as the thyroid cartilage is thereby prevented from being approximated to the hyoid bone.... An elephant can, as the quotations sufficiently prove, withdraw water ...
Paperback: 30 pages
Publisher: General Books LLC (February 9, 2012)
Language: English
ISBN-10: 123585034X
ISBN-13: 978-1235850349
Product Dimensions: 7.4 x 0.1 x 9.7 inches
Amazon Rank: 11111636
Format: PDF ePub Text TXT fb2 book
- Louis Compton Miall epub
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g. 2.--E, E, pharyngeal pouch. F, superior constrictor. G, stylo-glossus. H, hyo-glossus. K, small muscle, which diminishes the depth of the pharyngeal pouch. L, genio-glossus muscle. (For the use of the woodcuts of figs. 1 and 2 we are indebted to Professor Turner.) stomach in two ways: first, it may be regurgitated directly into the nasal passages l by the action of the diaphragm and abdominal muscles, the soft palate being at the same time depressed, so as to prevent the entrance of water into the mouth. Having in this manner filled the large nasal passages communicating with the trunk, the water contained in them is then forced through the trunk by means of a powerful expiration; or, in the second place, the water may be withdrawn from the cavity of the mouth by means of the trunk inserted into it. Now, in this case, it is manifestly impossible that the water can be contained within the cavity of the mouth itself, as I have already shown that the lips in the elephant are so formed as effectually to prevent this. The water regurgitated is, however, by means of the elevation of the soft palate, forced into the pharyngeal pouch. The superior aperture of this pouch being much narrower than the diameter of the pouch itself, and being completely surrounded by the muscular fibres of the stylo-glossus on each side, and the root of the tongue in front, which is prolonged backwards so as to form a free sharp margin, we have thus as it were a narrow aperture surrounded by a sphincter muscle, into which the trunk being inserted and grasped above its dilated extremity...