Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 94
... chloroform , a narrow spiral strip between one and two feet long was immersed in sea - water containing a large dose of the anaesthetic ; the observations being taken at six seconds ' intervals , the following were the results ...
... chloroform , a narrow spiral strip between one and two feet long was immersed in sea - water containing a large dose of the anaesthetic ; the observations being taken at six seconds ' intervals , the following were the results ...
Pagina 95
... chloroform Six seconds later ... ... Six seconds later ... ... Six seconds later ... Six seconds later ... ... One second Wave blocked Fig . 18 . In such experiments , the recovery of the normal rate in unpoisoned water is gradual ...
... chloroform Six seconds later ... ... Six seconds later ... ... Six seconds later ... Six seconds later ... ... One second Wave blocked Fig . 18 . In such experiments , the recovery of the normal rate in unpoisoned water is gradual ...
Pagina 213
... chloroform , etc. - 1 . Spon- taneity ceases . 2. On now nipping a tentacle , pulling the manubrium , or irritating the bell , а single locomotor contraction is given in answer to every stimulation . ( In the unanææsthesiated animal a ...
... chloroform , etc. - 1 . Spon- taneity ceases . 2. On now nipping a tentacle , pulling the manubrium , or irritating the bell , а single locomotor contraction is given in answer to every stimulation . ( In the unanææsthesiated animal a ...
Pagina 216
... chloroform , even when pushed to the extent of suspending irritability . If , however , Sarsia which have been anæsthesiated to this extent in chloroform be suddenly transferred to a solution of caffein , the tentacles and manubrium may ...
... chloroform , even when pushed to the extent of suspending irritability . If , however , Sarsia which have been anæsthesiated to this extent in chloroform be suddenly transferred to a solution of caffein , the tentacles and manubrium may ...
Pagina 234
... chloroform , if Sarsia are transferred to normal water after they first cease to move , a few seconds are enough to restore their spontaneity ; whereas , if they are allowed to remain in the poisoned water for an hour , they may not ...
... chloroform , if Sarsia are transferred to normal water after they first cease to move , a few seconds are enough to restore their spontaneity ; whereas , if they are allowed to remain in the poisoned water for an hour , they may not ...
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