. First aid in illness and injury; . eeding CONSTRUCTION OF THE HUMAN MACHINE vessel above the wound and interferes with proper compres-sion when it is found. There are three principal fats in the body, — stearin, palmitin, andolein. These all consist of glycerine, which is an alcohol, in combina-tion with a fatty acid, stearic, palmitic, or oleic, as the case may the manufacture of soap, these acids set free the glycerine andcombine instead with an alkali. Fat is ordinarily seen in the form of adi-pose tissue, which is formed by masses ofminute vesicles consisting of an exceedinglydelic
. First aid in illness and injury; . eeding CONSTRUCTION OF THE HUMAN MACHINE vessel above the wound and interferes with proper compres-sion when it is found. There are three principal fats in the body, — stearin, palmitin, andolein. These all consist of glycerine, which is an alcohol, in combina-tion with a fatty acid, stearic, palmitic, or oleic, as the case may the manufacture of soap, these acids set free the glycerine andcombine instead with an alkali. Fat is ordinarily seen in the form of adi-pose tissue, which is formed by masses ofminute vesicles consisting of an exceedinglydelicate membrane filled with fatty matter andhaving an average diameter of zfo of an vesicles are grouped together andretained in place mainly by microscopicblood-vessels. The amount of adipose tissuein the body is subject to great variations ac-cording to its location, being entirely absent,for instance, in the brain and in the eyelids,while it is present in great abundance aboutthe kidneys and other parts of the Fig. 2. — Adipose tissuemagnified. CHAPTER III THE FRAMEWORK —THE BONES The bones form the framework about which are groupedthe soft parts of which the body is otherwise also are designed for the protection of vital centres, asthe brain is protected by the skull, and the heart and lungsare guarded from injury by the thorax. They consist of ahard, brittle substance, liable to become broken by suddensevere violence, but of sufficient strength to sustain anystrain that may ordinarily be applied to them. Bones are composed of one-third animal matter, principally gelatinand blood-vessels, and two-thirds mineral matter, carbonate, phosphate,and fluoride of lime, soda, common salt, and phosphate of magnesia. The mineral constituents of bone may be dissolved by , leaving behind only the gelatinous animal matter while still re- THE FRAMEWORK THE BONES
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