Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 27
... systole and diastole follow one another with as perfect a rhythm as they do in the beating of a heart . Effects of excising the entire Margins of Nectocalyces . Confining our attention under this heading to the naked - eyed Medusa , I ...
... systole and diastole follow one another with as perfect a rhythm as they do in the beating of a heart . Effects of excising the entire Margins of Nectocalyces . Confining our attention under this heading to the naked - eyed Medusa , I ...
Pagina 139
... systole while another part is in diastole , and now several parts may be in diastole while other parts are in systole . And as in these animals very slight causes seem sufficient thus to impair the ganglionic co - ordination , it ...
... systole while another part is in diastole , and now several parts may be in diastole while other parts are in systole . And as in these animals very slight causes seem sufficient thus to impair the ganglionic co - ordination , it ...
Pagina 184
... systole and diastole would assuredly result ; and , therefore , that the rhythmical character of the natural swimming motions is dependent , not on the peculiar relations of the ganglionic , but on the primary qualities of the ...
... systole and diastole would assuredly result ; and , therefore , that the rhythmical character of the natural swimming motions is dependent , not on the peculiar relations of the ganglionic , but on the primary qualities of the ...
Pagina 194
... systole . But if the bell be transferred to normal sea - water immediately after , or , still better , slightly before the tonic spasm has become complete , an interesting series of pheno- mena is presented . The spasm persists for a ...
... systole . But if the bell be transferred to normal sea - water immediately after , or , still better , slightly before the tonic spasm has become complete , an interesting series of pheno- mena is presented . The spasm persists for a ...
Pagina 218
... systole and diastole follow one another in the unpoisoned animal , we now have periods of violent and prolonged systole resembling tonic spasm ; and when the severity of this spasm is for a moment abated , it is generally renewed before ...
... systole and diastole follow one another in the unpoisoned animal , we now have periods of violent and prolonged systole resembling tonic spasm ; and when the severity of this spasm is for a moment abated , it is generally renewed before ...
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