Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 11
... muscular fibres , and its thickness , which is pretty uniform , is nowhere greater than that of very thin paper . The manubrium is the mouth and stomach of the animal , and at the point where it is attached to or suspended from the ...
... muscular fibres , and its thickness , which is pretty uniform , is nowhere greater than that of very thin paper . The manubrium is the mouth and stomach of the animal , and at the point where it is attached to or suspended from the ...
Pagina 20
... muscular cells ; and , in the tentacles , neuro - muscular cells joined with cells of special sensation ( Sinneszellen ) . No nervous elements could be detected in the convex surface of the umbrella , and it is doubtful whether they ...
... muscular cells ; and , in the tentacles , neuro - muscular cells joined with cells of special sensation ( Sinneszellen ) . No nervous elements could be detected in the convex surface of the umbrella , and it is doubtful whether they ...
Pagina 23
... muscular tissues . In point of time , I was the first to make the fundamental observation , and he was the first to publish it . The sundry features in which our subsequent investigations agreed , and those in which they differed , I ...
... muscular tissues . In point of time , I was the first to make the fundamental observation , and he was the first to publish it . The sundry features in which our subsequent investigations agreed , and those in which they differed , I ...
Pagina 26
... muscular tissue . Such being the structure of the organ , the mechanism whereby it effects locomotion is very simple , consisting merely of an alternate contraction and relaxation of the entire muscular sheet which lines the cavity of ...
... muscular tissue . Such being the structure of the organ , the mechanism whereby it effects locomotion is very simple , consisting merely of an alternate contraction and relaxation of the entire muscular sheet which lines the cavity of ...
Pagina 27
... 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.
... 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.
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