Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 8
... pass upwards to the brain , the feet will be actively drawn away from a source of irritation without the man being conscious of any pain ; the lower nervous centres in the spinal cord respond to the stimulation , but they do so without ...
... pass upwards to the brain , the feet will be actively drawn away from a source of irritation without the man being conscious of any pain ; the lower nervous centres in the spinal cord respond to the stimulation , but they do so without ...
Pagina 8
... pass upwards to the brain , the feet will be actively drawn away from a source of irritation without the man being conscious of any pain ; the lower nervous centres in the spinal cord respond to the stimulation , but they do so without ...
... pass upwards to the brain , the feet will be actively drawn away from a source of irritation without the man being conscious of any pain ; the lower nervous centres in the spinal cord respond to the stimulation , but they do so without ...
Pagina 20
... pass into muscle- fibres , similar to those which Kleinenberg has called neuro - muscular cells ; and , in the tentacles , neuro - muscular cells joined with cells of special sensation ( Sinneszellen ) . No nervous elements could be ...
... pass into muscle- fibres , similar to those which Kleinenberg has called neuro - muscular cells ; and , in the tentacles , neuro - muscular cells joined with cells of special sensation ( Sinneszellen ) . No nervous elements could be ...
Pagina 58
... pass from end to end . On now removing the ganglion , waiting a few minutes , and then stimulating with successive induction shocks , the same progressive penetration is observable as that which previously took place with the ganglionic ...
... pass from end to end . On now removing the ganglion , waiting a few minutes , and then stimulating with successive induction shocks , the same progressive penetration is observable as that which previously took place with the ganglionic ...
Pagina 68
... pass round the disc , or they must zigzag round and round the tops of these overlapping cuts . Now , remembering that the passage of these contraction waves is presumably dependent on the nervous network progressively distributing the ...
... pass round the disc , or they must zigzag round and round the tops of these overlapping cuts . Now , remembering that the passage of these contraction waves is presumably dependent on the nervous network progressively distributing the ...
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