Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 3
... connected with many days of that purest form of enjoy- ment which can only be experienced in the pursuit of science . And here I may observe that the worker in marine zoology has one great advantage over his other scientific brethren ...
... connected with many days of that purest form of enjoy- ment which can only be experienced in the pursuit of science . And here I may observe that the worker in marine zoology has one great advantage over his other scientific brethren ...
Pagina 4
... connected with many days of that purest form of enjoy- ment which can only be experienced in the pursuit of science . And here I may observe that the worker in marine zoology has one great advantage over his other scientific brethren ...
... connected with many days of that purest form of enjoy- ment which can only be experienced in the pursuit of science . And here I may observe that the worker in marine zoology has one great advantage over his other scientific brethren ...
Pagina 4
... connection that the plan or mechanism of locomotion is completely different in the two classes , and that in the case of each class the plan or mechanism is unique , i.e. is not to be met with elsewhere in the animal kingdom . It is ...
... connection that the plan or mechanism of locomotion is completely different in the two classes , and that in the case of each class the plan or mechanism is unique , i.e. is not to be met with elsewhere in the animal kingdom . It is ...
Pagina 6
... connection I can afford to be brief , inasmuch as it is not needful to discuss the so - called vivisection question . I have merely to make it plain that , so far as the experiments which I am about to describe are concerned , there is ...
... connection I can afford to be brief , inasmuch as it is not needful to discuss the so - called vivisection question . I have merely to make it plain that , so far as the experiments which I am about to describe are concerned , there is ...
Pagina 17
... connected with the latter from within , but differs widely from it ; for the nerve - cells contain a longi- tudinally striated cylindrical or thread - like nucleus which carries on its peripheral end a delicate hair , while its central ...
... connected with the latter from within , but differs widely from it ; for the nerve - cells contain a longi- tudinally striated cylindrical or thread - like nucleus which carries on its peripheral end a delicate hair , while its central ...
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