Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 24
... remain quite passive . But every time a stimulus is supplied to it , either by means of a pinch , a burn , an electrical shock , or a chemical irritant , the muscle will give a single contraction in response to every stimulation . And ...
... remain quite passive . But every time a stimulus is supplied to it , either by means of a pinch , a burn , an electrical shock , or a chemical irritant , the muscle will give a single contraction in response to every stimulation . And ...
Pagina 27
... , after removal of the entire margin , three centres of spontaneity were found to remain in the sheet of contractile tissue lining the nectocalyx . of the muscular system , there being no subsequent movements FUNDAMENTAL EXPERIMENTS . 27.
... , after removal of the entire margin , three centres of spontaneity were found to remain in the sheet of contractile tissue lining the nectocalyx . of the muscular system , there being no subsequent movements FUNDAMENTAL EXPERIMENTS . 27.
Pagina 45
... remain for a few minutes in the dark to recover shock , and , lastly , proceeded to throw in single flashes of light of measured duration . I found that unless the flash of light was of slightly more than one second in its duration , no ...
... remain for a few minutes in the dark to recover shock , and , lastly , proceeded to throw in single flashes of light of measured duration . I found that unless the flash of light was of slightly more than one second in its duration , no ...
Pagina 58
... remain- ing one , and found it to be conspicuous enough that , after the occurrence of one of the natural pauses ( if this were of sufficient duration ) , the first contraction was feeble , the next stronger , the next still stronger ...
... remain- ing one , and found it to be conspicuous enough that , after the occurrence of one of the natural pauses ( if this were of sufficient duration ) , the first contraction was feeble , the next stronger , the next still stronger ...
Pagina 78
... remain anatomi- cally insulated throughout their length . So that the simile by which I have represented this nervous network - the simile , namely , of a sheet of muslin overspreading the whole of the muscular sheet - is , as a simile ...
... remain anatomi- cally insulated throughout their length . So that the simile by which I have represented this nervous network - the simile , namely , of a sheet of muslin overspreading the whole of the muscular sheet - is , as a simile ...
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