Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 25
... directions from the seat of disturbance as from a A nerve , on the other hand , conducts the stimulus without sensibly moving or undergoing any change of shape . Now , in order not to forget this distinction , I shall always speak of ...
... directions from the seat of disturbance as from a A nerve , on the other hand , conducts the stimulus without sensibly moving or undergoing any change of shape . Now , in order not to forget this distinction , I shall always speak of ...
Pagina 51
... direction , and close to the gap caused by the missing segment . The other , or free , end of this straw was firmly joined to a capillary glass rod , which was suit- ably bent to avoid contact with the rim of the basin , and also to ...
... direction , and close to the gap caused by the missing segment . The other , or free , end of this straw was firmly joined to a capillary glass rod , which was suit- ably bent to avoid contact with the rim of the basin , and also to ...
Pagina 67
... directions , Fig . 9 . and so meet at the point of the disc which is opposite to the ganglion . Suppose , now , a number of radial cuts are made in the disc according to such a plan as this ( Fig . 9 ) , wherein every radial cut deeply ...
... directions , Fig . 9 . and so meet at the point of the disc which is opposite to the ganglion . Suppose , now , a number of radial cuts are made in the disc according to such a plan as this ( Fig . 9 ) , wherein every radial cut deeply ...
Pagina 68
... directions represented by the arrows without undergoing any appreciable loss of vigour . Upon completing the circular cut at z , the ring of tissue ( y z ) became totally paralyzed , while the outer circle , of course , continued its ...
... directions represented by the arrows without undergoing any appreciable loss of vigour . Upon completing the circular cut at z , the ring of tissue ( y z ) became totally paralyzed , while the outer circle , of course , continued its ...
Pagina 76
... direction b a , opposite to that which the nervous or tentacular wave had previously pursued . Now this tentacular wave , being an optical expression of a pas- sage of a wave of stimulation , is a sight 76 JELLY - FISH , STAR - FISH ...
... direction b a , opposite to that which the nervous or tentacular wave had previously pursued . Now this tentacular wave , being an optical expression of a pas- sage of a wave of stimulation , is a sight 76 JELLY - FISH , STAR - FISH ...
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