Human physiology : designed for colleges and the higher classes in schools and for general reading . FIRST VERTEBRA. FIG. 96. PIG. First and SecondVERTEBRAE TOGETHER. gECOND VERTEBRA. 188 HUMAN PHYSIOLOGY. Special defense of spinal cord in neck of birds. mounting of the head, as we may term it, a peculiar contrivanceand a nice adjustment are needed to prevent injury of a veryimportant organ. It is a wonderful contrivance, by which somuch and so varied motion can be effected in the very walls thatcontain the soft and delicate spinal marrow, without injuring*it. You will fully appreciate th
Human physiology : designed for colleges and the higher classes in schools and for general reading . FIRST VERTEBRA. FIG. 96. PIG. First and SecondVERTEBRAE TOGETHER. gECOND VERTEBRA. 188 HUMAN PHYSIOLOGY. Special defense of spinal cord in neck of birds. mounting of the head, as we may term it, a peculiar contrivanceand a nice adjustment are needed to prevent injury of a veryimportant organ. It is a wonderful contrivance, by which somuch and so varied motion can be effected in the very walls thatcontain the soft and delicate spinal marrow, without injuring*it. You will fully appreciate this, if you observe the extent andvariety of the motions of the head and neck, executed chieflywith the two bones that I have described. 288. In the neck of birds there is a contrivance of a differentcharacter, for the arrangement which answers for the motionsrequired by man, obviously could not secure the very free mo-tions which the bird executes with its neck. As the bird bendsits neck at such abrupt angles in all directions, a peculiar ar-rangement of the vertebras is necessary, to prevent the spinalmarrow from being pressed u
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