Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 12
... tissue ; and it is on this account that the group is called " covered- eyed , " in contradistinction to the " naked - eyed , " where these little hoods or coverings are invariably absent ( compare Fig . 1 with Fig . 22 ) , and the ...
... tissue ; and it is on this account that the group is called " covered- eyed , " in contradistinction to the " naked - eyed , " where these little hoods or coverings are invariably absent ( compare Fig . 1 with Fig . 22 ) , and the ...
Pagina 11
... tissue . This tissue constitutes the earliest appearance in the animal kingdom of true muscular fibres , and its thickness , which is pretty uniform , is nowhere greater than that of very thin paper . The manubrium is the mouth and ...
... tissue . This tissue constitutes the earliest appearance in the animal kingdom of true muscular fibres , and its thickness , which is pretty uniform , is nowhere greater than that of very thin paper . The manubrium is the mouth and ...
Pagina 12
... tissue ; and it is on this account that the group is called " covered- eyed , " in contradistinction to the " naked - eyed , " where these little hoods or coverings are invariably absent ( compare Fig . 1 with Fig . 22 ) , and the ...
... tissue ; and it is on this account that the group is called " covered- eyed , " in contradistinction to the " naked - eyed , " where these little hoods or coverings are invariably absent ( compare Fig . 1 with Fig . 22 ) , and the ...
Pagina 13
... tissue had been clearly shown to occur in all animals higher in the zoolo- gical scale than the Medusæ , so that it was of much importance to ascertain whether or not the first occurrence of this tissue was to be met with in this class ...
... tissue had been clearly shown to occur in all animals higher in the zoolo- gical scale than the Medusæ , so that it was of much importance to ascertain whether or not the first occurrence of this tissue was to be met with in this class ...
Pagina 15
... tissue , in which no cellular elements can be distinguished , but which is longitudinally striated in a manner very suggestive of fibrillation . Treatment with acetic acid , how- ever , brings out distinct nuclei in the case of the ...
... tissue , in which no cellular elements can be distinguished , but which is longitudinally striated in a manner very suggestive of fibrillation . Treatment with acetic acid , how- ever , brings out distinct nuclei in the case of 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