Elementary Anatomy and Physiology
Format: Paperback
ISBN13: 9780217799560
Paperback|9780217799560
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Overview
This historic book may have numerous typos, missing text or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1851. Not illustrated. Excerpt: ... LESSON II. THE BONES. The hard bony frame-work of the human body is called the skeleton. This structure is admirably formed for voluntary1 motion, as well as for protecting the most important organs within the body. It is divided by anatomists into three principal divisions, called the head, the trunk, and the extremities; each division being composed of a great number of bones articulated together, and firmly united by means of sutures,2 cartilage,3 or strong ligaments.4 The extremities are joined to the trunk by what are called ball and socket joints,5 but most of the other movable joints are termed hinge6 joints. Bones are of various and peculiar forms combining lightness with great strength. They derive their nutriment from the blood, and are therefore provided with arteries, veins, and nerves, though these are few in number compared with many other parts of the body. Voluntary, dependant on the will. Sutures, seam-like joinings as in the skull. Cartilage, a gristly substance covering the end of bones, but sometimes placed between them as in the bones of the spine. Ligaments, white fibrous bands for binding parts together. Ball and socket joints, like a cup and ball, giving great freedom of motion, as at the shoulders and thighs. Hinge joints, as at the elbows and knees. B S Bones are composed for the most part of an animal substance called gelatine,7 and of an earthly substance called phosphate8 of lime; to the one belongs life and nourishment, and to the other hardness. The gelatine is the larger proportion in youth, and the lime in old age. Broken bones are reunited by the parts being placed opposite to each other and kept firmly in their place; the vessels secreting bony material to effect the junction. QUEST IONS. What is the skeleton? What seems to be ...
| ISBN-13 | 9780217799560 |
|---|---|
| ISBN-10 | 0217799566 |
| Weight | 0.36 Pounds |
| Dimensions | 9.00 x 6.00 x 0.24 In |
| List Price | $14.14 |
| Format | Paperback |
|---|---|
| Pages | 102 pages |
| Publisher | |
| Published On | 2009-12-01 |
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