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390 Veterinary Histology of Domestic Mammals and Birds

tufts is lined by a cuboidal to low columnar epithelium the subarachnoid space of the meninges. Cerebrospinal
VetBooks.ir composed of modified ependymal cells (Figure 17.14). fluid is a clear, watery liquid containing few cells, little pro-
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The choroid plexuses produce the cerebrospinal fluid tein and relatively large quantities of Na , Ka and Cl ions.
(liquor cerebrospinalis) that fills the entire ventricular The cerebrospinal fluid provides protection for the central
system of the brain, the central canal of the spinal cord and nervous system and allows for metabolic exchange.

17.12 Spinal ganglion (dog). Haematoxylin and eosin stain (x300).

17.13 Autonomic ganglion (dog). Silver impregnation (x250).

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