. General physiology; an outline of the science of life. ELEMENTARY VITAL PHENOMENA 267 minuteness of the latter, but the rule must hold good as well for the cell-complex, the tissue. As a matter of fact it may be demonstrated in the latter, and Herman's " differential theory" ('67—'68), according to which a current may be led off from a tissue (muscle, nerve, mucous membrane, etc.) only when differ- ent processes are taking place at the leading-off points, is merely the expression of the actual relations. In a resting uninjured muscle, , the sartwius of the frog, which is the be
. General physiology; an outline of the science of life. ELEMENTARY VITAL PHENOMENA 267 minuteness of the latter, but the rule must hold good as well for the cell-complex, the tissue. As a matter of fact it may be demonstrated in the latter, and Herman's " differential theory" ('67—'68), according to which a current may be led off from a tissue (muscle, nerve, mucous membrane, etc.) only when differ- ent processes are taking place at the leading-off points, is merely the expression of the actual relations. In a resting uninjured muscle, , the sartwius of the frog, which is the best object for demonstrating the truth of this, no current is present, because the same internal processes are taking place at every point (Fig. 121). If, however, at two points in the muscle a difference be produced artificially by warming one point, by cutting the muscle across, which is associated with a local decomposition of living substance, or by making a contraction-wave pass over the muscle, an electric current is obtained; the warmed, dying or contracting part becomes negative to all other parts. Tissues. 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 Verworn, Max, 1863-1921; Lee, Frederic S. (Frederic Schiller), 1859-1939. London, Macmillan and co. , limited; New York, The Macmillan company
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