Treatise on human physiology : for the use of students and practitioners of medicine / by Henry C. Chapman.

  • Henry Cadwalader Chapman
Date:
1887
Catalogue details

Licence: Public Domain Mark

Credit: Treatise on human physiology : for the use of students and practitioners of medicine / by Henry C. Chapman. Source: Wellcome Collection.

    863/942 page 875
    Cede Pel WR clave MUSCULAR CONTRACTILITY. In considering the subject of nervous irritability, it will be remem- bered that the contraction of a muscle following stimulation of the nerve supplying it, was taken as an indication and measure of the changes occurring in the latter. The changes undergone by the muscle itself, however, during its contraction remain still to be described. Muscles are of two kinds, striped and unstriped, of which the former will be first studied. Striped muscles, such as the skeletal muscles, heart, diaphragm, ete., consist of fasciculi or bundles of fibres separated by connective tissue, the latter being prolonged from the outer envelope or perimysium covering the muscle. Each muscular fibre is a more or less cylindrical tube mm 3 to 4 cm. (1.2 to 1.6 of an inch) in length, and between }th and »yth of a mm. (;}>th and gt jth of an inch) in s/ ah 7 De My ‘ Nig yyy — Mig —s An > — ei B S — — i. — a nt sion Ee : ll — = —s SSS | bigy 2 fag KS <—s Sa a tte ae / Fie 3 lily iy My spd od taivs Se we fog jf ie tins hy ittigae So LT ity j Se Tr NT ; a] lH SS ttt titan seas i ii my | g isa ae lt elon ee: See Sta, tae Sati el a SSS thie Same ci) 3 © ices = ee = = ig q tities ~ lit — ~ FE i ny = ni % ~~ =a ae ng ta : 0 Rigg ei Se wae 5, i P hy od z aN ~ i — = sig is bie \ % wih ried % Stas la J f eo ‘ol ena — woe) bye bin | z —— Ce 2 SS init gy tie 4 i = Ong re q _ ite mi rr na fg win a ror “ied ce 8 3 — inva 4 bs SAT i ! 4 by: ME A. Portion of a medium-sized human muscular fibre (magnified nearly 800 diameters). 3B, separated a, a, larger, and b, b, smaller collections; c, still smaller; d, d, the buniles of fibrils, equally magnified ; smallest which could be detached. (KiRKES.) diameter, and consists of three parts, the sarcolemma or sheath, the ) sarcous substance, and the nuclei or muscle corpuscles. lemma is the elastic, transparent, structureless, and colorless sheath enclos- The latter being marked transversely by ing the sarcous substance. SO ate
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