. Applied physiology : including the effects of alcohol and narcotics . XIII THE BRAIN 229. The brain. — The mind, which is the real man, andwhich feels, thinks, and makes our bodies move, lives inthe brain. The brain lies in the top of the head and iscovered with the bones of the skull. It is a soft, whitemass weighing about three pounds. 230. The medulla. — The brain is made of three mainparts. Just above the spinal cord is a small, wedge-shaped part called the medullaoblongata. The medullais a part of the spinalcord as well as of thebrain. It gives off nervesto the head just as thespinal co
. Applied physiology : including the effects of alcohol and narcotics . XIII THE BRAIN 229. The brain. — The mind, which is the real man, andwhich feels, thinks, and makes our bodies move, lives inthe brain. The brain lies in the top of the head and iscovered with the bones of the skull. It is a soft, whitemass weighing about three pounds. 230. The medulla. — The brain is made of three mainparts. Just above the spinal cord is a small, wedge-shaped part called the medullaoblongata. The medullais a part of the spinalcord as well as of thebrain. It gives off nervesto the head just as thespinal cord gives themto the rest of the it is a little bundle ofnerve cells which sendout the orders for thebody to breathe. Whenthese cells are hurt, breathing stops at once and the bodydies. So the medulla is often said to be the seat of life. 231. The cerebellum. — Above the medulla is a roundpart of the brain called the cerebellum. It neither sendsorders nor feels, but in some unknown way it helps therest of the brain so that they send out better orders for. Human brain cut crosswise. THE BRAIN 23 walking and standing upright, and for all motions in whichthe body must make exact movements. A bird or dogwithout its cerebellum cannot run or stand, but flutters orrolls about the floor. Yet it is strong and acts all rightin other ways. 232. The cerebrum. — The uppermost part of the brainis the cerebrum. It is about four times as large as all the Ifiegion
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