Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 21
... ( Aurelia aurita ) . * He also found that the marginal bodies present a peculiar modification of epithelium tissue , which is on its way , so to speak , towards becoming fully differentiated into ganglionic cells . Lastly , returning to ...
... ( Aurelia aurita ) . * He also found that the marginal bodies present a peculiar modification of epithelium tissue , which is on its way , so to speak , towards becoming fully differentiated into ganglionic cells . Lastly , returning to ...
Pagina 33
... Aurelia aurita as a type of the group , I cannot say that , either by excising the lithocysts alone or by leaving the lithocysts in situ and excising all the rest of the marginal tissue , I have ever detected the slightest indications ...
... Aurelia aurita as a type of the group , I cannot say that , either by excising the lithocysts alone or by leaving the lithocysts in situ and excising all the rest of the marginal tissue , I have ever detected the slightest indications ...
Pagina 38
... Aurelia aurita , often gives rise to a whole series of rhythmical pulsations , the systoles and diastoles following one another at about the same rate as is observable in the normal swimming motions of the unmutilated animal . of It is ...
... Aurelia aurita , often gives rise to a whole series of rhythmical pulsations , the systoles and diastoles following one another at about the same rate as is observable in the normal swimming motions of the unmutilated animal . of It is ...
Pagina 48
... Aurelia , tolerably strong faradization does cause a more or less well - pro- nounced tetanus . The continuity of the spasm is , indeed , often interrupted by momentary and partial relaxations . These interruptions are the more fre ...
... Aurelia , tolerably strong faradization does cause a more or less well - pro- nounced tetanus . The continuity of the spasm is , indeed , often interrupted by momentary and partial relaxations . These interruptions are the more fre ...
Pagina 49
... Aurelia be cut into the longest possible strip with a remnant of the disk left attached at one end , as represented in Fig . 11 ( p . 70 ) , then all the peculiar time relations between successive contractions which are intentionally ...
... Aurelia be cut into the longest possible strip with a remnant of the disk left attached at one end , as represented in Fig . 11 ( p . 70 ) , then all the peculiar time relations between successive contractions which are intentionally ...
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