Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 12
... tentacles , which vary greatly in size and number in different species ( see Figs . 1 and 8 ) . The margin also supports another series of bodies which will presently be found to be of much importance for us . These are the so - called ...
... tentacles , which vary greatly in size and number in different species ( see Figs . 1 and 8 ) . The margin also supports another series of bodies which will presently be found to be of much importance for us . These are the so - called ...
Pagina 12
... tentacles , which vary greatly in size and number in different species ( see Figs . 1 and 8 ) . The margin also supports another series of bodies which will presently be found to be of much importance for us . These are the so - called ...
... tentacles , which vary greatly in size and number in different species ( see Figs . 1 and 8 ) . The margin also supports another series of bodies which will presently be found to be of much importance for us . These are the so - called ...
Pagina 15
... tentacle there is a ganglionic swelling , and it is from these ganglionic swellings that the nerves just mentioned ... tentacles . Cells , as a rule , can only be observed in the gan- glionic swellings , where they appear as fusiform ...
... tentacle there is a ganglionic swelling , and it is from these ganglionic swellings that the nerves just mentioned ... tentacles . Cells , as a rule , can only be observed in the gan- glionic swellings , where they appear as fusiform ...
Pagina 19
... tentacles . It invariably lies between the layer of muscle - fibre and that of the epithelium . The processes of neighbouring ganglion - cells in the plexus either coalesce or dwindle in their course to small fibres : at the margin of ...
... tentacles . It invariably lies between the layer of muscle - fibre and that of the epithelium . The processes of neighbouring ganglion - cells in the plexus either coalesce or dwindle in their course to small fibres : at the margin of ...
Pagina 20
... tentacles , neuro - muscular cells joined with cells of special sensation ( Sinneszellen ) . No nervous elements could be detected in the convex surface of the umbrella , and it is doubtful whether they occur in the veil . In some ...
... tentacles , neuro - muscular cells joined with cells of special sensation ( Sinneszellen ) . No nervous elements could be detected in the convex surface of the umbrella , and it is doubtful whether they occur in the veil . In some ...
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