Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 37
... rarely 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.
... rarely 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
... normal swimming motions of the unmutilated animal . of It is somewhat difficult , in the case of paralyzed swimming organs , to prove the occurrence of a contraction in response to thermal stimulation , from the fact that while these ...
... normal swimming motions of the unmutilated animal . of It is somewhat difficult , in the case of paralyzed swimming organs , to prove the occurrence of a contraction in response to thermal stimulation , from the fact that while these ...
Pagina 94
... anaesthetic ; the observations being taken at six seconds ' intervals , the following were the results : - Normal water ... Six seconds after trans- ference to chloroform 94 JELLY - FISH , STAR - FISH , AND SEA - URCHINS .
... anaesthetic ; the observations being taken at six seconds ' intervals , the following were the results : - Normal water ... Six seconds after trans- ference to chloroform 94 JELLY - FISH , STAR - FISH , AND SEA - URCHINS .
Pagina 95
... normal rate in unpoisoned water is gradual . Taking , for instance , the case of a spiral strip in morphia ( Fig . 19 ) , it will be seen that the original rate did not fully return . Some substances , however , exert a more marked ...
... normal rate in unpoisoned water is gradual . Taking , for instance , the case of a spiral strip in morphia ( Fig . 19 ) , it will be seen that the original rate did not fully return . Some substances , however , exert a more marked ...
Pagina 96
... normal sea - water . An hour later One second ... Wave blocked Fig . 20 . From these experiments , however , it must not be definitely concluded that it is the anaesthesiating property of such substances which exerts this slow- ing and ...
... normal sea - water . An hour later One second ... Wave blocked Fig . 20 . From these experiments , however , it must not be definitely concluded that it is the anaesthesiating property of such substances which exerts this slow- ing and ...
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