Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 10
... begin by briefly describing such features in the anatomy of the jelly - fish as will afterwards be found especially to concern us . In size , the different species of Medusa vary from that of a small pea to that of a large umbrella ...
... begin by briefly describing such features in the anatomy of the jelly - fish as will afterwards be found especially to concern us . In size , the different species of Medusa vary from that of a small pea to that of a large umbrella ...
Pagina 23
... begin by explaining what physiologists mean by the term " excitability . " Suppose that a * " Die Medusen physiologisch und morphologisch auf ihr Nervensystem untersucht " ( Tübingen , 1878 ) . muscle has been cut from the body of a ...
... begin by explaining what physiologists mean by the term " excitability . " Suppose that a * " Die Medusen physiologisch und morphologisch auf ihr Nervensystem untersucht " ( Tübingen , 1878 ) . muscle has been cut from the body of a ...
Pagina 30
... 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 the operation , as to general vigour , etc. , appears to be ...
... 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 the operation , as to general vigour , etc. , appears to be ...
Pagina 52
... begins , the latent period ( bc ) is determined - the time occupied by the rotation of the cylinder from b to c being known . Summation of Stimuli . - In this way I have been able to ascertain the period of latent stimula- tion in ...
... begins , the latent period ( bc ) is determined - the time occupied by the rotation of the cylinder from b to c being known . Summation of Stimuli . - In this way I have been able to ascertain the period of latent stimula- tion in ...
Pagina 65
... begin with the covered - eyed Medusa , I shall briefly state three modes of section , the results of which serve to show in a striking manner the fact in question . The annexed woodcuts represent the umbrella of Aurelia aurita , with ...
... begin with the covered - eyed Medusa , I shall briefly state three modes of section , the results of which serve to show in a striking manner the fact in question . The annexed woodcuts represent the umbrella of Aurelia aurita , with ...
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