Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 15
... ganglia are composed of a delicate and transparent tissue , in which no cellular elements can be distinguished , but which is longitudinally striated in a manner very suggestive of fibrillation . Treatment with acetic acid , how- ever ...
... ganglia are composed of a delicate and transparent tissue , in which no cellular elements can be distinguished , but which is longitudinally striated in a manner very suggestive of fibrillation . Treatment with acetic acid , how- ever ...
Pagina 23
... ganglia , to and from which large bundles of nerve - fibres come and go . To explain the function of nerve - tissue , it is necessary to begin by explaining what physiologists mean by the term " excitability . " Suppose that a * " Die ...
... ganglia , to and from which large bundles of nerve - fibres come and go . To explain the function of nerve - tissue , it is necessary to begin by explaining what physiologists mean by the term " excitability . " Suppose that a * " Die ...
Pagina 25
... ganglia , they often appear to discharge their energy spontaneously ; so that in all but the very lowest animals , whenever we see apparently spontaneous action , we infer that ganglia are probably present . Lastly , another important ...
... ganglia , they often appear to discharge their energy spontaneously ; so that in all but the very lowest animals , whenever we see apparently spontaneous action , we infer that ganglia are probably present . Lastly , another important ...
Pagina 44
... ganglia was due to any necessity on the part of the latter to accumulate the stimulating influence prior to origi- nating a discharge , or to an immensely lengthened period of latent stimulation manifested by the ganglia under the ...
... ganglia was due to any necessity on the part of the latter to accumulate the stimulating influence prior to origi- nating a discharge , or to an immensely lengthened period of latent stimulation manifested by the ganglia under the ...
Pagina 45
... ganglia , which required somewhat more represent the time during which the series of physiological pro- cesses are taking place in response to an adequate stimulus , or does it represent the time during which light requires to act ...
... ganglia , which required somewhat more represent the time during which the series of physiological pro- cesses are taking place in response to an adequate stimulus , or does it represent the time during which light requires to act ...
Termeni și expresii frecvente
able ambulacral feet artificial rhythm Aurelia aurita become bell blocked brium cause ceased chloroform co-ordination continue contractile strip contractile tissue contraction contraction-waves covered-eyed Medusa crawling curare diastole direction discharge Echinoderm Echinodermata Echinus effect excising excitable tissues experiments fact feeble fibres forceps fresh water function ganglionic glycerine hour Illustrations induction shocks influence instance intervals irritability jelly-fish latter lithocyst locomotor centres manubrium marginal bodies marginal ganglia minutes movements muscle muscular mutilated naked-eyed Medusa natural rhythm nectocalyx nerve nerve-cells nerve-centre nerve-fibres nerve-ring nerve-trunks nervous network nervous system normal sea-water observed occur organ paralyzed pass pedicellariæ pedicels period of latent physiological plexus poison portion prepotent Professor pulsations radial tubes rays reflex reflex action removed response Sarsia seconds segments spasm species specimens spines spontaneity Star-fish strychnia suckers surface swimming motions swimming-bell systole tank temperature tentacles tentacular tetanus Tiaropsis indicans tion umbrella unmutilated animal wave whole