. The American journal of anatomy . f Sarcomere. Hensens me-dian Krausesmembrane. Sarcomere. Sarcous cle- ment. Sarcoplasm. B, Fig. 9 Diagrams to illustrate the phenomenon of contraction in voluntarystriped muscle (A and B according to Schaefer; C has been added by the writer).According to Schaefer, diagram A illustrates two relaxed, moderately extended,sarcomeres; B, two contracted sarcomeres. During contraction the isotropicsubstance of the light disc is supposed to become absorbed by the anisotropicsubstance of the dark disc, thus producing a shortening and thickening
. The American journal of anatomy . f Sarcomere. Hensens me-dian Krausesmembrane. Sarcomere. Sarcous cle- ment. Sarcoplasm. B, Fig. 9 Diagrams to illustrate the phenomenon of contraction in voluntarystriped muscle (A and B according to Schaefer; C has been added by the writer).According to Schaefer, diagram A illustrates two relaxed, moderately extended,sarcomeres; B, two contracted sarcomeres. During contraction the isotropicsubstance of the light disc is supposed to become absorbed by the anisotropicsubstance of the dark disc, thus producing a shortening and thickening of thefiber. To bring these diagrams into agreement with Schaefers illustrations ofwasps wing muscle (fig. 6), upon which they are based, A and B must be regardedas single sarcostyles (not six myofibrils) each with five pores through which thehyaline lightly staining substance passes into the deeply staining sarcousmaterial of the dark disc. The writer has added diagram C to illustrate hisconception of the contracted fiber (with six myofibrils; or a sarcostyle with s
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectanatomy, bookyear1920
