Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 73
... localizing the spot at which the contraction - wave ceased to pass ) , I can scarcely doubt that in every case the blocking is caused by the cutting through of nerves . * In a highly interesting paper recently published by Dr. W. H. ...
... localizing the spot at which the contraction - wave ceased to pass ) , I can scarcely doubt that in every case the blocking is caused by the cutting through of nerves . * In a highly interesting paper recently published by Dr. W. H. ...
Pagina 111
... localizing a point of irritation which is seated either in its own substance or in that of the bell . We have here , then , a curious fact , and one which it will be well to bear in mind during our subsequent endeavours to frame some ...
... localizing a point of irritation which is seated either in its own substance or in that of the bell . We have here , then , a curious fact , and one which it will be well to bear in mind during our subsequent endeavours to frame some ...
Pagina 112
... localizing power of the former , as regards that point in the latter , is wholly destroyed . For instance , if such a cut as that represented at a ( see Fig . 22 ) be made in the nectocalyx of this Medusa , the manu- brium will no ...
... localizing power of the former , as regards that point in the latter , is wholly destroyed . For instance , if such a cut as that represented at a ( see Fig . 22 ) be made in the nectocalyx of this Medusa , the manu- brium will no ...
Pagina 114
... localizing motions to perhaps the proper quadrant of the bell ; and if the stimulus be applied still nearer to the attachment of the severed strip , as at j , the localizing motions of the manubrium may become quite accurate . Again ...
... localizing motions to perhaps the proper quadrant of the bell ; and if the stimulus be applied still nearer to the attachment of the severed strip , as at j , the localizing motions of the manubrium may become quite accurate . Again ...
Pagina 115
... localizing power of the manubrium ; so that , for instance , if the cut A ' B ' were situated nearly at the base of the manubrium , the latter organ might be able to localize correctly a stimulus ap- plied , not only as before at ƒ ...
... localizing power of the manubrium ; so that , for instance , if the cut A ' B ' were situated nearly at the base of the manubrium , the latter organ might be able to localize correctly a stimulus ap- plied , not only as before at ƒ ...
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