Identifier: handbookofphysio00bake (find matches)
Title: Hand-book of physiology
Year: 1892 (1890s)
Authors: Baker, W. Morrant, (William Morrant), 1839-1896 Harris, Vincent Dormer Kirkes, William Senhouse, 1823-1864. Hand-book of physiology. 13th ed
Subjects: Physiology Human physiology
Publisher: London : John Murray
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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..«- s.m.p. Fig. 99.—Transverse section of the ramus visceralis ofthe vagus of skate, v.g., visceralis ganglion;m.m.f., median medullated fibres ; s.m.f., smallmedullated fibres. (T. W. Shore), IOO STRUCTURE OF THE ELEMENTARY TISSUES, (ch. III. difference in the two kinds of fibres. The non-medullated fibresfrequently branch. It is worthy of note that in the foetus, at an early period ofdevelopment, all nerve-fibres are non-medullated. Nerve-trunks.—Each nerve-trunk is composed of a variablenumber of different-sized bundles (funiculi) of nerve-fibres whichhave a special sheath (perineurium). The funiculi are enclosedin a firm fibrous sheath (epineurium) ; this sheath also sends inprocesses of connective tissue which connect the bundles together.
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Fig. ioo.—Transverse section of the sciatic nerve of a cat about x ioo.—It consists ofbundles (Funiculi) of nerve-fibres ensbeatbed in a fibrous supporting capsule, epi-neurium, A; eacb bundle bas a special sheatb (not sufficiently marked out from theepineurium in the figure) or perineurium B ; the nerve-fibres N/ are separated from oneanother by endoneurium; L, lymph spaces; Ar, artery ; V, vein; F, fat. Somewhatdiagrammatic. (V. D. Harris.) In the funiculi between the fibres is a delicate supporting tissue(the endoneurium). There are numerous lymph-spaces both beneath the connectivetissue investing individual nerve-fibres and also beneath thatwhich surrounds the funiculi. Every nerve-fibre in its course proceeds uninterruptedly from itsorigin in a nerve-centre to near its destination, whether this bethe periphery of the body, another nervous centre, or the samecentre whence it issued. Bundles of fibres run together in the nerve-trunk, but merelylie in apposition to each other; t

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