Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 37
... with three contractions , which are separated from one another by an interval of the same duration as the normal diastole of the unmutilated animal . Different species of Medusæ exhibit different degrees of irritability in 4.
... with three contractions , which are separated from one another by an interval of the same duration as the normal diastole of the unmutilated animal . Different species of Medusæ exhibit different degrees of irritability in 4.
Pagina 38
George John Romanes. Different species of Medusæ exhibit different degrees of irritability in responding to stimuli ... irritable surface from the height of one inch . As regards chemical stimulation , dilute spirit or other irritant ...
George John Romanes. Different species of Medusæ exhibit different degrees of irritability in responding to stimuli ... irritable surface from the height of one inch . As regards chemical stimulation , dilute spirit or other irritant ...
Pagina 56
... irritability of strona medium current current Fig . 5 . the tissue , no response is given to the first two or three shocks of a series ; but at the third or fourth shock a slight response is given , and from that point onward the ...
... irritability of strona medium current current Fig . 5 . the tissue , no response is given to the first two or three shocks of a series ; but at the third or fourth shock a slight response is given , and from that point onward the ...
Pagina 62
... irritability disappears . The extraordinary sluggishness of the latent period at very low temperatures is fully equalled by the no less extraordinary sluggishness of the contraction . In order to render apparent the degree in which both ...
... irritability disappears . The extraordinary sluggishness of the latent period at very low temperatures is fully equalled by the no less extraordinary sluggishness of the contraction . In order to render apparent the degree in which both ...
Pagina 93
... irritable or contractile surface was kept uppermost , and therefore suffered a gentle strain ; for the weight of the tissue on either side of the finger made the upper surface somewhat convex . By passing the finger all the way along ...
... irritable or contractile surface was kept uppermost , and therefore suffered a gentle strain ; for the weight of the tissue on either side of the finger made the upper surface somewhat convex . By passing the finger all the way along ...
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