. Elements of physiological psychology; a treatise of the activities and nature of the mind, from the physical and experimental points of view . Fig. 3.—The Jelly-Fish (schematic). (Bethe.)y, umbrella; B, circular band, containingN, the ring of nervous tissue; R, recep-tor; T, tentacle; M, mouth stalk. NERVE-NET TYPE OF NERVOUS SYSTEM 19. as the whole net. If all but one of the special receptors are removed,and then a further cut is made through the circular band on oneside of the remaining receptor, the whole band will even then exe-cute its rhythmic movements; and it makes no difference on w
. Elements of physiological psychology; a treatise of the activities and nature of the mind, from the physical and experimental points of view . Fig. 3.—The Jelly-Fish (schematic). (Bethe.)y, umbrella; B, circular band, containingN, the ring of nervous tissue; R, recep-tor; T, tentacle; M, mouth stalk. NERVE-NET TYPE OF NERVOUS SYSTEM 19. as the whole net. If all but one of the special receptors are removed,and then a further cut is made through the circular band on oneside of the remaining receptor, the whole band will even then exe-cute its rhythmic movements; and it makes no difference on whichside of the receptor the division is made. This shows that the con-duction is equally good in both directions. Moreover, even if manycuts are made part-way through the circular band, in such a manneras to leave the band of a zig-zag shape, the rhythmic contractionswill still spread from the remaining receptor throughout the band,provided only that thedivisions are not com-plete. This shows thatthe conduction can goaround corners and inevery direction throughthe circular band. Thatit is the nerve-net whichsupplies the means ofconduction is shown byexperiments in which acomplete separation ismade between two partsof the muscular tissue,without division of the nerve-strands connecting the two parts; the conduction is not inter-fe
Size: 1956px × 1277px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectpsychophysiology
