Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct - for the use of schools and colleges (1870) (14596194747)

Identifier: outlinesofcompar00agas (find matches)
Title: Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges
Year: 1870 (1870s)
Authors: Agassiz, Louis, 1807-1873 Gould, Augustus A. (Augustus Addison), 1805-1866 Wright, Thomas, 1809-1884
Subjects: Physiology, Comparative Zoology
Publisher: London : Bell & Daldy
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library



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of locomotion, and the modes of their application,as well as the greatest perfection, in whatever element they maybe employed. The sailing of the eagle, the bounding of the antelope, the swimming of the shark, are not equalled by any movements of insects. Tli:3 superiority is due to the internal skeleton, which, while it endows tlt£ j.\.iniiil with great force, gives to the motions, at the same time, a nice degree of precision. (§ 235. Before entering upon the study of the various motions of the vertebrate animals, and the means by which these are performed, it is important to put the student in possession of a standard by which he will be enabled to compare the form of the osseous elements and the modifications they undergo in fishes, reptiles, birds, and mammals. With this view we THE SKELETON. Ill proceed to give an outline of the structure of the Skeleton of Man (fig. 78), and the uses of its several parts. This bony frame-work is formed of 249 separate pieces, articulated together iu
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Fig. 78.—The Skeleton of Maa. 112 THE SKELETON. various ways, and divided into the HEAD, TETJNK, and EXTHE-MITIES. Some of the bones are single, and disposed on the median line of the body, in which case they are always formed of two halves, the counterpart of each other ; the great majority, however, consist of pairs. The following table exhibits the distribution of the bones. rOs front is .................................... 1 Ossa parietalia .................................. 2 Os occipitis .................................... 1 Ossa temporum ................................ 2 Ossicula audit us . . .............................. 8 Os sphenoides ................................. 1 Os ethmoides .................................. 1 Ossa malarum .................................. 2 Ossa maxillaria superiora ........................ 2 Ossa nasi ...................................... 2 Ossa lachrymalia .............................. 2 Ossa palatina .................................. 2 j O