Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 29
... hours , or even for days . Effects of excising the entire Margins of Umbrellas . Turning now to the covered - eyed division of the Medusæ , I find , in all the species I have come across , that excision of the margins of umbrellas ...
... hours , or even for days . Effects of excising the entire Margins of Umbrellas . Turning now to the covered - eyed division of the Medusæ , I find , in all the species I have come across , that excision of the margins of umbrellas ...
Pagina 30
... hour or more , occasional weak and unrhythmical contractions begin to mani- fest themselves , or the contractions may even be resumed with but little apparent change in their character and frequency . The condition of the animal before ...
... hour or more , occasional weak and unrhythmical contractions begin to mani- fest themselves , or the contractions may even be resumed with but little apparent change in their character and frequency . The condition of the animal before ...
Pagina 34
... hours and days after the former , in consequence of this operation , has ceased to move , the latter continues to perform whatever movements are characteristic of it in the unmuti- lated organism - indeed , these movements are not at ...
... hours and days after the former , in consequence of this operation , has ceased to move , the latter continues to perform whatever movements are characteristic of it in the unmuti- lated organism - indeed , these movements are not at ...
Pagina 80
... hour or more ; usually , however , it is from two to four minutes . This process of re - establishing the physiological connections , although rapid , is not so instantaneous as is that of their destruction by section . In general it ...
... hour or more ; usually , however , it is from two to four minutes . This process of re - establishing the physiological connections , although rapid , is not so instantaneous as is that of their destruction by section . In general it ...
Pagina 95
... hour after exposure to mophia . One minute after strength- ening dose .. Four minutes later , and just before ... hour later ... An hour later One second Wave blocked Fig . 19 . In normal water ... Quarter of an hour after exposure.
... hour after exposure to mophia . One minute after strength- ening dose .. Four minutes later , and just before ... hour later ... An hour later One second Wave blocked Fig . 19 . In normal water ... Quarter of an hour after exposure.
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