Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 3
... latter case , a summer's work resembles the pleasure - making of a picnic prolonged for months , with the sense of feel- ing all the while that no time is being profitlessly spent . Whether one is sailing about upon the sunny sea ...
... latter case , a summer's work resembles the pleasure - making of a picnic prolonged for months , with the sense of feel- ing all the while that no time is being profitlessly spent . Whether one is sailing about upon the sunny sea ...
Pagina 4
... latter case , a summer's work resembles the pleasure - making of a picnic prolonged for months , with the sense of feel- ing all the while that no time is being profitlessly spent . Whether one is sailing about upon the sunny sea ...
... latter case , a summer's work resembles the pleasure - making of a picnic prolonged for months , with the sense of feel- ing all the while that no time is being profitlessly spent . Whether one is sailing about upon the sunny sea ...
Pagina 17
... latter are for the most part bi - polar , more seldom multi- polar . The fibres which emanate from them are very delicate , and , becoming mixed with others , do not admit of being further traced . Where the nervous tissue meets the ...
... latter are for the most part bi - polar , more seldom multi- polar . The fibres which emanate from them are very delicate , and , becoming mixed with others , do not admit of being further traced . Where the nervous tissue meets the ...
Pagina 21
... latter to be less developed than the former . These points are , that in the nerve- centres of the covered - eyed Medusa there are no true ganglion - cells , or only very few ; that the mass of the central nervous system is very small ...
... latter to be less developed than the former . These points are , that in the nerve- centres of the covered - eyed Medusa there are no true ganglion - cells , or only very few ; that the mass of the central nervous system is very small ...
Pagina 24
... latter case the muscle responded to a stimulus applied at a distance from its own substance , which stimulus was then conducted to the muscle by the nerve . And in this we perceive the characteristic function of nerve - fibres , viz ...
... latter case the muscle responded to a stimulus applied at a distance from its own substance , which stimulus was then conducted to the muscle by the nerve . And in this we perceive the characteristic function of nerve - fibres , viz ...
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