Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 39
... immediately to originate a bout of swimming . But if the animal is non - vigorous , or if it be removed from the water and spread flat upon an object - glass , it usually gives only one contraction in response to every flash . There can ...
... immediately to originate a bout of swimming . But if the animal is non - vigorous , or if it be removed from the water and spread flat upon an object - glass , it usually gives only one contraction in response to every flash . There can ...
Pagina 40
... immediately sets in . Again , in a general way , it is observable that Sarsiæ are more active in the light than they are in the dark , the comparative duration of the quiescent stages being less in the former than in the latter case ...
... immediately sets in . Again , in a general way , it is observable that Sarsiæ are more active in the light than they are in the dark , the comparative duration of the quiescent stages being less in the former than in the latter case ...
Pagina 51
... immediately above the capillary glass - writer which proceeded from the Medusa care being taken to place the two writers in the same line , parallel to the axis of the cylinder . Such being the arrangement , the cylinder was rotated ...
... immediately above the capillary glass - writer which proceeded from the Medusa care being taken to place the two writers in the same line , parallel to the axis of the cylinder . Such being the arrangement , the cylinder was rotated ...
Pagina 94
... Immediately after severe handling of this kind , the retardation of contraction - waves . is sometimes even more marked than here represented ; but 1 think this may be partly due to shock , for on giving the tissue a little while to ...
... Immediately after severe handling of this kind , the retardation of contraction - waves . is sometimes even more marked than here represented ; but 1 think this may be partly due to shock , for on giving the tissue a little while to ...
Pagina 95
... Immediately after passage of wave on restoration to normal sea - water Four minutes later Quarter of an hour later ... An hour later One second Wave blocked Fig . 19 . In normal water ... Quarter of an hour after exposure. SECTION OF ...
... Immediately after passage of wave on restoration to normal sea - water Four minutes later Quarter of an hour later ... An hour later One second Wave blocked Fig . 19 . In normal water ... Quarter of an hour after exposure. SECTION OF ...
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