Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 1
... thoughts of many a ramble among the weedy rocks and living pools , where for the time being we all become naturalists , and where those who least know what they are likely to find in their search are most likely to approach the keen.
... thoughts of many a ramble among the weedy rocks and living pools , where for the time being we all become naturalists , and where those who least know what they are likely to find in their search are most likely to approach the keen.
Pagina 4
... thoughts of many a ramble among the weedy rocks and living pools , where for the time being we all become naturalists , and where those who least know what they are likely to find in their search are most likely to approach the keen.
... thoughts of many a ramble among the weedy rocks and living pools , where for the time being we all become naturalists , and where those who least know what they are likely to find in their search are most likely to approach the keen.
Pagina 18
... become more and more like the ordinary ganglion - cells of the nerve - ring the more that their long continuation towards the surface epithelium is shortened or lost , and these authors are thus led to conclude that the upper nerve ...
... become more and more like the ordinary ganglion - cells of the nerve - ring the more that their long continuation towards the surface epithelium is shortened or lost , and these authors are thus led to conclude that the upper nerve ...
Pagina 20
... become aggre- gated in the region of the generative organs , and in that of the radial canals , thus giving rise in these localities to what may be called nerve - trunks . But in other species no such aggregations are apparent , the ...
... become aggre- gated in the region of the generative organs , and in that of the radial canals , thus giving rise in these localities to what may be called nerve - trunks . But in other species no such aggregations are apparent , the ...
Pagina 49
... become blended during their passage along the thirty or forty inches of contractile tissue . The fact , of course , shows that the rate of transmission is so identical in the case of all the stimuli originated , that the sum of the ...
... become blended during their passage along the thirty or forty inches of contractile tissue . The fact , of course , shows that the rate of transmission is so identical in the case of all the stimuli originated , that the sum of the ...
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