. Elements of histology. Histology. io6 Elements of Histology. [Chap. xiv. When nerve-trunks anastomose so as to form a plexus—, in the brachial, or sacral plexus—there occurs an exchange and re-arrangement of nerve- bundles in the branches. A similar condition obtains in the ganglia of the cerebro-spinal nerves. Nerve-. Pig. 64.—Transverse Section through a Nerve-bundle in the Tail of Mouse. P, The perineurium ; e, the endoneurium separating the medullated nerve-fibres seen in cross section ; I, lymph spaces in the perineurium ; V, lymph spaces in the endoneurium. (Atlas.) trunks and nerv
. Elements of histology. Histology. io6 Elements of Histology. [Chap. xiv. When nerve-trunks anastomose so as to form a plexus—, in the brachial, or sacral plexus—there occurs an exchange and re-arrangement of nerve- bundles in the branches. A similar condition obtains in the ganglia of the cerebro-spinal nerves. Nerve-. Pig. 64.—Transverse Section through a Nerve-bundle in the Tail of Mouse. P, The perineurium ; e, the endoneurium separating the medullated nerve-fibres seen in cross section ; I, lymph spaces in the perineurium ; V, lymph spaces in the endoneurium. (Atlas.) trunks and nerve-branches passing through a lymph cavity, such as the subdural spaces, or the sub- cutaneous lymph sacs, or the cisterna lymphatica magna in the frog, receive from the serous membrane an outer endothelial covering. 139. The nerve-fibres in the nerve-bundles of the cerebro-spinal nerves, with the exception of the olfactory nerve, are medullated nerve-fibres. These are doubly or darkly contoured smooth cylindrical fibres, varying in diameter between ytjVo" an(^ tufotj" °^ an inch. Within the same bundle of a nerve—, of the brachial or sacral plexus—there occur fibres which are several times thicker than others, and it is pro- bable that they are derived from different sources. Schwalbe has shown that the thickness of the nerve-. 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 Klein, E. (Edward), 1844-1925. Philadelphia : H. C. Lea's Son
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