Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 23
... mean by the term " excitability . " Suppose that a * " Die Medusen physiologisch und morphologisch auf ihr Nervensystem untersucht " ( Tübingen , 1878 ) . muscle has been cut from the body of a freshly STRUCTURE OF THE MEDUSE . 23.
... mean by the term " excitability . " Suppose that a * " Die Medusen physiologisch und morphologisch auf ihr Nervensystem untersucht " ( Tübingen , 1878 ) . muscle has been cut from the body of a freshly STRUCTURE OF THE MEDUSE . 23.
Pagina 24
... excitability . " Nerves , no less than muscles , present the pro- perty of being excitable . If , together with the excised muscle , there had been removed from the animal's body an attached nerve , every time any part of this nerve is ...
... excitability . " Nerves , no less than muscles , present the pro- perty of being excitable . If , together with the excised muscle , there had been removed from the animal's body an attached nerve , every time any part of this nerve is ...
Pagina 38
... excitable surface while it is exposed to the air . In this and in other ways I have satisfied myself that the paralyzed tissues of swimming organs respond to sudden elevations of temperature . Luminous Stimulation . It is interesting to ...
... excitable surface while it is exposed to the air . In this and in other ways I have satisfied myself that the paralyzed tissues of swimming organs respond to sudden elevations of temperature . Luminous Stimulation . It is interesting to ...
Pagina 46
... excitability of such a sense - organ and that of a fully evolved eye , which is able to effect the needful molecular changes in response to a flash as instantaneous as that of lightning . With regard to luminous stimulation , it is only ...
... excitability of such a sense - organ and that of a fully evolved eye , which is able to effect the needful molecular changes in response to a flash as instantaneous as that of lightning . With regard to luminous stimulation , it is only ...
Pagina 47
... excitable tissues of the Medusa in their behaviour towards electrical stimulation conform to the rules which are followed by excitable tissues of other animals . Thus , closure of the constant current acts as a stronger stimulus than ...
... excitable tissues of the Medusa in their behaviour towards electrical stimulation conform to the rules which are followed by excitable tissues of other animals . Thus , closure of the constant current acts as a stronger stimulus than ...
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