An introduction to anatomy and physiology : for the use of general readers, young persons, and junior medical students.

  • Sandwith, Thomas.
Date:
1825
Catalogue details

Licence: Public Domain Mark

Credit: An introduction to anatomy and physiology : for the use of general readers, young persons, and junior medical students. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    the corpus callosum, fornix, and a part to be next described, pons varolii, are peculiar to the mammalia. The circumstances worthy of note, at the basis of the brain, are the union of the two crura cerebri, and crura cerebelli [pons varolii), before which are two little white bodies (icorpora albicantia), and the medulla oblongata, or root of the spinal marrow, on which are two eminences, the corpora oliviria, and pyramidalia. The cerebellum is of the same texture as the cerebrum; only when it is cut across, the cortical matter, except in fishes, resembles the arbor- escence of a tree; and hence it is called the arbor vitce. The texture of the spinal marrow resembles the medullary matter of the brain. Generally speaking, except in figure, the brain and spinal marrow are alike in vertebral animals; and it is observed by Blumenbach, that in nothing is the gradation of animals so clearly seen, as in their conformation. If these organs exist at all in zoophytes, they are interwoven with their texture. Insects and vermes have merely a nervous chord somewhat enlarged at one end; the mollusca have a brain placed near the oeso- phagus, with a variable number of ganglia, from both of which arise the nerves ; but in vertebi al