. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. of the same number of elements. For the serial order of nucleary deposition throughout the whole length of the spinal axis proves that the anterior nucleus (4) of the lateral mass (3, 4) of the sacral vertebra (B) is the true homologue of the so called " transverse pro- cess " (4) of the lumbar vertebra (u,fg. 447.), and of the costa (4) of the thoracic form (A, tig. 448.) and of the anterior half of the cervical transverse process (4, fig. 445.). All these pieces hold serial order ; all are autogenous growths
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. of the same number of elements. For the serial order of nucleary deposition throughout the whole length of the spinal axis proves that the anterior nucleus (4) of the lateral mass (3, 4) of the sacral vertebra (B) is the true homologue of the so called " transverse pro- cess " (4) of the lumbar vertebra (u,fg. 447.), and of the costa (4) of the thoracic form (A, tig. 448.) and of the anterior half of the cervical transverse process (4, fig. 445.). All these pieces hold serial order ; all are autogenous growths ; all are posited in the same relation with respect to the other vertebral pieces (1, 2, 3, 5) of the cervical, dorsal, and lumbar forms. Now, having once determined the proper identity of the anterior nucleus (4) of the lateral mass (3, 4) of the sacral vertebra (s,fig. 448.), it becomes easy to recognise the homological cast and relation of all the other pieces of the sacral vertebra. The posterior half (3) of the lateral mass of the sacral ver- tebra (B) is the counterpart of the " tubercle " (3) of the lumbar vertebra (n)(/%. 447.), of the transverse process (3) of the dorsal vertebra (A, J?g. 448.), and of the posterior half of the transverse process (3) of the cervical vertebra (fig. 445.). The spinous process (1), laminae (2, 2), centrum, or body (5) of the sacral vertebra (B, fig. 448.) are evidently identical with the like-named parts of all the other vertebras correspondingly numbered. It will hence appear that sacral vertebras do not differ from other vertebras ; and that it is an error as to the identity of the anterior nucleus. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Todd, Robert Bentley, 1809-1860. London, Sherwood, Gilbert, and Piper
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Keywords: ., bo, booksubjectanatomy, booksubjectphysiology, booksubjectzoology
