Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
Din interiorul cărții
Rezultatele 1 - 5 din 14
Pagina 51
... segment of the um- brella . A light straw was then forced through the gelatinous substance of the umbrella in a radial direction , and close to the gap caused by the missing segment . The other , or free , end of this straw was firmly ...
... segment of the um- brella . A light straw was then forced through the gelatinous substance of the umbrella in a radial direction , and close to the gap caused by the missing segment . The other , or free , end of this straw was firmly ...
Pagina 52
... segment were drawn apart , and in this way a curve was obtained by the other writer on the rotating cylinder . Now , by after- wards dropping a perpendicular line from the point at which the electro - magnet writer changed its position ...
... segment were drawn apart , and in this way a curve was obtained by the other writer on the rotating cylinder . Now , by after- wards dropping a perpendicular line from the point at which the electro - magnet writer changed its position ...
Pagina 132
... segments no longer present syn- chronous action ; for now one segment and now another takes the initiative in starting a contraction- wave , which is then propagated to the other segments . And it is evident that this fact tends to ...
... segments no longer present syn- chronous action ; for now one segment and now another takes the initiative in starting a contraction- wave , which is then propagated to the other segments . And it is evident that this fact tends to ...
Pagina 140
... segment and now another originating a discharge which then spreads to all the others in the form of a contraction - wave . The next experiment I tried was to make four short 140 JELLY - FISH , STAR - FISH , AND SEA - URCHINS .
... segment and now another originating a discharge which then spreads to all the others in the form of a contraction - wave . The next experiment I tried was to make four short 140 JELLY - FISH , STAR - FISH , AND SEA - URCHINS .
Pagina 152
... segments contracted at the following rates , in one - minute intervals : - Time after operation . Segment . Segment . Segment A. Segment B. hour . 20 25 27 15 1 20 25 27 15 99 2 hours . 29 25 27 16 4 19 16 27 12 " " Next morning , the ...
... segments contracted at the following rates , in one - minute intervals : - Time after operation . Segment . Segment . Segment A. Segment B. hour . 20 25 27 15 1 20 25 27 15 99 2 hours . 29 25 27 16 4 19 16 27 12 " " Next morning , 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