. The anatomy of the human body. Human anatomy; Anatomy. 116 ARTHROLOGY. ticular processes of this vertebra, and of the atlas, and behind the condyles of the occipi- tal cone : remove the spinal marrow and its membranes. In this way the vertebral col- umn will be divided into two parts : an anterior, formed by the series of the bodies of the vertebras, on which we find the anterior and posterior comvion ligaments, and the interver- tebral substances; and a posterior, formed bV the series of laminae, and the articular and spinous processes. The intervertebral substances require a special prepar
. The anatomy of the human body. Human anatomy; Anatomy. 116 ARTHROLOGY. ticular processes of this vertebra, and of the atlas, and behind the condyles of the occipi- tal cone : remove the spinal marrow and its membranes. In this way the vertebral col- umn will be divided into two parts : an anterior, formed by the series of the bodies of the vertebras, on which we find the anterior and posterior comvion ligaments, and the interver- tebral substances; and a posterior, formed bV the series of laminae, and the articular and spinous processes. The intervertebral substances require a special preparation, which consists in making vertical and horizontal sections of a portion of the column, or which may be more simply effected by maceration in diluted nitric acid, which allows the bodies of the vertebras to be removed without injuring the intervertebral substance. The vertebrae are united, 1. By their bodies ; 2. By their articular processes ; 3. By thefr laminae ; and, 4. By their spinous processes. Articulation of the Bodies of the Vertebra. The bodies of the vertebrae are united together by amphiarthrosis. The arthrodial por- tion, or the contiguous surface, is represented by the articular processes. The articular surfaces are the upper and under surfaces of the body of each vertebra. It follows, from the concavity of these surfaces, that, instead of fitting each other exact- ly, they leave considerable lenticular spaces between them; these appear to be the ves- tiges of the biconical cavity between the vertebrae of fishes. The depth of these spaces is not the same throughout the entire column ; it exactly measures the thickness of the intervertebral substance. By measurement, I have ascertained that the height of the in- tervertebral substance in the loins is one half of that of the bodies of the vertebra, in the back one third, and in the neck a little more than the half From the size of the bodies of the vertebra, it follows that the interval between the bodies is la
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