. Elementary anatomy and physiology : for colleges, academies, and other schools. Anatomy; Physiology. 32 HITCHCOCK'S ANATOMY. Fig. 30. from Fig. 30, which is a human Fibula tied in a knot after hav- ing been immersed for some JA 82. Mechanical Construc- rv ' ; ; tion of Cones,—As a general law the extremities are the largest, and the bodies or shafts are smooth and of a uniform surface. They are in most ll^BHISPi^&l cases so constructed as to give lXy the greatest strength and sup- port, and at the same time fur- nish as little weight as possible. Hence the long bones are most- ly hollow,
. Elementary anatomy and physiology : for colleges, academies, and other schools. Anatomy; Physiology. 32 HITCHCOCK'S ANATOMY. Fig. 30. from Fig. 30, which is a human Fibula tied in a knot after hav- ing been immersed for some JA 82. Mechanical Construc- rv ' ; ; tion of Cones,—As a general law the extremities are the largest, and the bodies or shafts are smooth and of a uniform surface. They are in most ll^BHISPi^&l cases so constructed as to give lXy the greatest strength and sup- port, and at the same time fur- nish as little weight as possible. Hence the long bones are most- ly hollow, or have an arched form, while the flat bones are portions of a circle or sphere. In the face also the bones are not all solid, but some of them contain large cavities, so that firm attachment may be given to the muscles, and protection to the more delicate parts. 83. Average Weight of adult Skeleton,—The weight of the skeleton is as : 100, or about one tenth the weight of the whole body. And since the average weight of an adult man is 136 pounds, the weight of an adult skeleton is about pounds. 84. Strength of Bones.—The power of the human bones as levers when compared with different substances is remark- able, as is seen by the following table. Freestone (sandstone) 1. Lead Elm and Ash (wood) Box, Yew, and Oak 11. Human Bone 22. 82. Which part of the bones is generally the largest? Why are many of the bones hollow or partially so ? 83. Give the weight of the human skeleton. What is its pro- portion to that of the whole body ? 84. Give the comparative strength of the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hitchcock, Edward, 1793-1864; Hitchcock, Edward, 1828-1911. New York : Ivison, Phinney, Blakeman & Co. ; Chicago : S. C. Griggs & Co.
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