. The physiology of the domestic animals; a text-book for veterinary and medical students and practitioners. Physiology, Comparative; Domestic animals. 30 PHYSIOLOGY OF THE DOMESTIC ANIMALS. substance, which may present the greatest variety as to quantity. The cell-membrane and so-called cell-capsule belong to these forms of proto- plasmic modification. In cartilage and loose connective tissue this intercellular substance exists in such amount that the still actively moving protoplasmic cells appear to be forced apart by it. (See Fig. 24.) Since the more active vital movements can only origina
. The physiology of the domestic animals; a text-book for veterinary and medical students and practitioners. Physiology, Comparative; Domestic animals. 30 PHYSIOLOGY OF THE DOMESTIC ANIMALS. substance, which may present the greatest variety as to quantity. The cell-membrane and so-called cell-capsule belong to these forms of proto- plasmic modification. In cartilage and loose connective tissue this intercellular substance exists in such amount that the still actively moving protoplasmic cells appear to be forced apart by it. (See Fig. 24.) Since the more active vital movements can only originate in _the semi-fluid protoplasm of cells, it is evident that the more or less rigid intercellular substance could only take a slight part in organic processes if there were not some means by which it could be brought into close 1 HI tt-OT. Pig. 25.—Nerve-Fibres. (Thanhoffer.) 1, a, medullated nerve-fibre; b. non-medullated nerve-fibre from the sympathetic of the ox (after Schultae) ; 2, non-medullated nerve-fibre from Jacobson's organ in the sheep (after Schnltze) ; 3, nerve- fibres with Ranvier's nodes (R), from the sciatic of the frog; 4. funnel-shaped arrangement of medulla from sciatic of frog, treated with osmic acid; 5, nerve-fibre from frog, with axis-oylinder (t) and so-called horny mesh-work; 6, diagram of medullated nerve-fibre; n, neurilemma; v, medullary sheath ; t, axis- cylinder. association with the active vital processes constantly occurring in the interior of cells. Consequently we find the entire intercellular substance pierced of a mesh-work of fine canals, through which the cells send prolongations of their outer layer, which, after numerous subdivisions, serve to connect neighboring cells. By means of these juice-canals interchange between the contents of the various cells is possible and the intercellular substance receives its necessary supply of nourishment, while the connection of cell with cell is an illustration of the loss of individuality of cell
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