Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 3
... instance , I con- trast my own work in a town laboratory on vertebrated animals with that which I am now about to describe upon the invertebrated in a laboratory set up upon the sea - beach , it is im- possible not to feel that the ...
... instance , I con- trast my own work in a town laboratory on vertebrated animals with that which I am now about to describe upon the invertebrated in a laboratory set up upon the sea - beach , it is im- possible not to feel that the ...
Pagina 8
... instance was to obtain evidence of the very existence of nerve - tissue - all question of pain must have vanished . Whatever opinions , therefore , we may severally entertain on the vexed question of vivisection as a whole , and with ...
... instance was to obtain evidence of the very existence of nerve - tissue - all question of pain must have vanished . Whatever opinions , therefore , we may severally entertain on the vexed question of vivisection as a whole , and with ...
Pagina 4
... instance , I con- trast my own work in a town laboratory on vertebrated animals with that which I am now about to describe upon the invertebrated in a laboratory set up upon the sea - beach , it is im- possible not to feel that the ...
... instance , I con- trast my own work in a town laboratory on vertebrated animals with that which I am now about to describe upon the invertebrated in a laboratory set up upon the sea - beach , it is im- possible not to feel that the ...
Pagina 6
... instance , they are considerably lower in the scale of organization than an oyster , and in none of the experiments which I have performed upon them has so much laceration . of living tissue been entailed as that which is caused by ...
... instance , they are considerably lower in the scale of organization than an oyster , and in none of the experiments which I have performed upon them has so much laceration . of living tissue been entailed as that which is caused by ...
Pagina 7
... For within the limits of our own organism we have direct evidence that nervous mechanisms , much more highly elaborated than any of those which we are about to consider , are incapable of suffering . Thus , for instance , INTRODUCTION .
... For within the limits of our own organism we have direct evidence that nervous mechanisms , much more highly elaborated than any of those which we are about to consider , are incapable of suffering . Thus , for instance , INTRODUCTION .
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