The outlines of anatomy, physiology, and hygiene Being an edition of The essentials of anatomy, physiology, and hygiene, rev to conform to the legislation making the effects of alcohol and other narcotics upon the human system a mandatory study in public schools . rades on the march while fast asleep. CHAPTER IV. THE LRAIX. 281. The Brain.—The brain and the cerebrum areoften spoken of as if they were convertible this is not correct. The brain includes all thatpart of the nervous system which lies within the cav-ity of the skull. This great mass of nervous matteris made up of several
The outlines of anatomy, physiology, and hygiene Being an edition of The essentials of anatomy, physiology, and hygiene, rev to conform to the legislation making the effects of alcohol and other narcotics upon the human system a mandatory study in public schools . rades on the march while fast asleep. CHAPTER IV. THE LRAIX. 281. The Brain.—The brain and the cerebrum areoften spoken of as if they were convertible this is not correct. The brain includes all thatpart of the nervous system which lies within the cav-ity of the skull. This great mass of nervous matteris made up of several distinct ganglia, which, to be sure, are connected withone another and interde-pendent, and yet each ofthem has its own particularfunction which the othershave not (Fig. 57). The cere-brum is merely one of theseganglia, and, although thehighest in the scale as re-gards the character of itsfunctions, it being the gan-glion which principallv Fig. 57.—Dias^am showing the . ^ . -^ position of the nervous con- gi^cs man his pre-cmmenceters in the head. ovcr the lowcr auimals, it is one of the least importantas regards the mere preservation of life. In manyof the lower animals it can be entirely removed, andthe animal will live for months afterward. In the. 220 ORGANS OF CO-ORDINATION. human being it is so plentifully supplied with blood-vessels that, if its removal should be attempted, theperson would die of haemorrhage. This has beenthe invariable result of experiments on the higherkinds of animals, as the dog or horse. But there isno doubt that, if the cerebrum could be removedwithout interfering with the circulation of the blood,even a human being would continue to live with-out it. 282. Structure of the Cerebrum.—The cerebriiin(Fig. 58) is the largest part of the brain, forming as
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