Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
Din interiorul cărții
Rezultatele 1 - 5 din 35
Pagina 12
... single circular tube . This circular or marginal tube in both cases communi- Lates by minute apertures with the external medium . The margin of the umbrella , both in the naked and covered eyed Medusa , supports a series of con ...
... single circular tube . This circular or marginal tube in both cases communi- Lates by minute apertures with the external medium . The margin of the umbrella , both in the naked and covered eyed Medusa , supports a series of con ...
Pagina 12
... single circular tube . This circular or marginal tube in both cases communi- Lates by minute apertures with the external medium . The margin of the umbrella , both in the naked and covered eyed Medusa , supports a series of con ...
... single circular tube . This circular or marginal tube in both cases communi- Lates by minute apertures with the external medium . The margin of the umbrella , both in the naked and covered eyed Medusa , supports a series of con ...
Pagina 24
... single contraction in response to every stimulation . And it is this readiness of organic tissues to respond to a suitable stimulus that physiologists designate by the term " excitability . " Nerves , no less than muscles , present the ...
... single contraction in response to every stimulation . And it is this readiness of organic tissues to respond to a suitable stimulus that physiologists designate by the term " excitability . " Nerves , no less than muscles , present the ...
Pagina 29
... single mar- ginal body cut out of the bell of Sarsia , this tiny piece of tissue , in this isolated state , will continue its contractions for hours , or even for days . Effects of excising the entire Margins of Umbrellas . Turning now ...
... single mar- ginal body cut out of the bell of Sarsia , this tiny piece of tissue , in this isolated state , will continue its contractions for hours , or even for days . Effects of excising the entire Margins of Umbrellas . Turning now ...
Pagina 34
... . Summary of Chapter . With a single exception to hundreds of observa- tions upon six widely divergent genera of naked- eyed Medusa , I find it to be uniformly true 34 JELLY - FISH , STAR - FISH , AND SEA - URCHINS .
... . Summary of Chapter . With a single exception to hundreds of observa- tions upon six widely divergent genera of naked- eyed Medusa , I find it to be uniformly true 34 JELLY - FISH , STAR - FISH , AND SEA - URCHINS .
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