Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 4
... take pleasure in our work , we are most likely sacrificing one part of our humanity to the altar of some other , and probably less worthy , constituent . I may now say a few words on the scope of the investigations which are to be ...
... take pleasure in our work , we are most likely sacrificing one part of our humanity to the altar of some other , and probably less worthy , constituent . I may now say a few words on the scope of the investigations which are to be ...
Pagina 15
... take their origin . The most conspicuous of these nerves are those that proceed to the radial canals and marginal bodies , while the least con- spicuous are those that proceed to the tentacles . Cells , as a rule , can only be observed ...
... take their origin . The most conspicuous of these nerves are those that proceed to the radial canals and marginal bodies , while the least con- spicuous are those that proceed to the tentacles . Cells , as a rule , can only be observed ...
Pagina 31
... take the case of the naked- eyed Medusæ first , it is evident that in most of the genera , in consequence of the intertentacular spaces being so small , it is impossible to cut out the marginal bodies ( which are situated at the bases ...
... take the case of the naked- eyed Medusæ first , it is evident that in most of the genera , in consequence of the intertentacular spaces being so small , it is impossible to cut out the marginal bodies ( which are situated at the bases ...
Pagina 37
... take the case of Sarsia as a type , nothing can possibly be more definite than is the single sharp contraction of the mutilated nectocalyx in response to every nip with the forceps . The contraction is precisely similar to the ordinary ...
... take the case of Sarsia as a type , nothing can possibly be more definite than is the single sharp contraction of the mutilated nectocalyx in response to every nip with the forceps . The contraction is precisely similar to the ordinary ...
Pagina 43
... in response to light , the characteristic spasm does not take place till slightly more than a second has elapsed after the first occurrence of the stimulus . As this extraordinary difference in EXPERIMENTS IN STIMULATION . 43.
... in response to light , the characteristic spasm does not take place till slightly more than a second has elapsed after the first occurrence of the stimulus . As this extraordinary difference in EXPERIMENTS IN STIMULATION . 43.
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