Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 6
... caused by opening an oyster and eating it alive , after due application of pepper and vinegar . There- fore , if any one should be foolish enough to object to my experiments on the score of vivisection , a fortiori they are bound to ...
... caused by opening an oyster and eating it alive , after due application of pepper and vinegar . There- fore , if any one should be foolish enough to object to my experiments on the score of vivisection , a fortiori they are bound to ...
Pagina 17
... causing a well - defined swelling of nervous tissue against the epithelium of the veil and umbrella . In the Geryonidæ this swelling is still further strengthened by a peculiar modification of the other tissues in the neighbourhood ...
... causing a well - defined swelling of nervous tissue against the epithelium of the veil and umbrella . In the Geryonidæ this swelling is still further strengthened by a peculiar modification of the other tissues in the neighbourhood ...
Pagina 27
... causes immediate , total , and permanent paralysis of the entire organ . Nothing can possibly be more definite than in this highly remarkable effect . I have made hundreds of observations upon various species of the naked - eyed Medusæ ...
... causes immediate , total , and permanent paralysis of the entire organ . Nothing can possibly be more definite than in this highly remarkable effect . I have made hundreds of observations upon various species of the naked - eyed Medusæ ...
Pagina 32
... causes are combined . Indeed , it has been a matter of the greatest surprise to me how very minute a portion of the intertentacular marginal tissue is sufficient , in case of this genus , to animate the entire swimming - bell . Choosing ...
... causes are combined . Indeed , it has been a matter of the greatest surprise to me how very minute a portion of the intertentacular marginal tissue is sufficient , in case of this genus , to animate the entire swimming - bell . Choosing ...
Pagina 35
... causes instantaneous , complete , and permanent paralysis of the locomotor system . In the genus Sarsia , my observations point very decidedly to the conclusion that the principal locomotor centres are the marginal bodies , but that ...
... causes instantaneous , complete , and permanent paralysis of the locomotor system . In the genus Sarsia , my observations point very decidedly to the conclusion that the principal locomotor centres are the marginal bodies , but that ...
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