An Introduction to the Study of Zoology, Illustrated by the CrayfishAppleton, 1906 - 371 pagini |
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Pagina 18
... branchial cavities ; cg , cervical groove ; these letters are placed on the carapace ; r , rostrum ; t , t ' , the two divisions of the telson ; 1 , eye - stalks ; 2 , antennules ; 3 , antennæ ; 20 , lateral lobes of tail - fin ; XV ...
... branchial cavities ; cg , cervical groove ; these letters are placed on the carapace ; r , rostrum ; t , t ' , the two divisions of the telson ; 1 , eye - stalks ; 2 , antennules ; 3 , antennæ ; 20 , lateral lobes of tail - fin ; XV ...
Pagina 25
... branchial chamber . These branchiæ are the respiratory organs ; and they perform the same functions as the gills of a fish , to which they present some similarity . If the gills are cleared away , it is seen that the branchial cavity is ...
... branchial chamber . These branchiæ are the respiratory organs ; and they perform the same functions as the gills of a fish , to which they present some similarity . If the gills are cleared away , it is seen that the branchial cavity is ...
Pagina 27
... branchial chamber is open behind , below , and in front ; and , therefore , that the water in which the crayfish habitually lives has free ingress and egress . Thus the air dissolved in the water enables breathing to go on , just as it ...
... branchial chamber is open behind , below , and in front ; and , therefore , that the water in which the crayfish habitually lives has free ingress and egress . Thus the air dissolved in the water enables breathing to go on , just as it ...
Pagina 69
... branchial chamber to a cavity situated in the dorsal region of the thorax , termed the pericardium ( p ) , into which they open . The blood of the crayfish is kept in a state of con- stant circulating motion by a pumping and ...
... branchial chamber to a cavity situated in the dorsal region of the thorax , termed the pericardium ( p ) , into which they open . The blood of the crayfish is kept in a state of con- stant circulating motion by a pumping and ...
Pagina 70
... branchial vessel ; bcr , branchio - cardiac vein ; bg , branchiostegite ; em , extensor muscles of abdomen ; ep , epi- meral wall of thoracic cavity ; ev , efferent branchial vessel ; fm , flexor muscles of abdomen ; fp , floor of ...
... branchial vessel ; bcr , branchio - cardiac vein ; bg , branchiostegite ; em , extensor muscles of abdomen ; ep , epi- meral wall of thoracic cavity ; ev , efferent branchial vessel ; fm , flexor muscles of abdomen ; fp , floor of ...
Alte ediții - Afișează-le pe toate
An Introduction to the Study of Zoology, Illustrated by the Crayfish Thomas Henry Huxley Vizualizare completă - 1895 |
An Introduction to the Study of Zoology, Illustrated by the Crayfish Thomas Henry Huxley Vizualizare completă - 1902 |
Termeni și expresii frecvente
abdomen abdominal appendages abdominal somites ambulatory limbs Amurland animals antenna antennule aperture appears artery arthrobranchiæ Astacine Astacus fluviatilis Astacus torrentium attached basal joint blastomeres blood body branchiæ branchial cavity carapace cardiac cavity cephalothorax cervical groove chelate chitinous corpuscles coxopodite cray Crustacea cuticle cuticular division ecdysis Écrevisses edge endopodite English crayfish epiblast epipodite exopodite exoskeleton eye-stalk fact female filaments fluviatilis.-A forceps front ganglia ganglion gastrolith gills give rise green gland hind-gut hinder hypoblast Illustrations inner integument lateral leptodactylus less lobster longitudinal male mid-gut middle modified morphological muscle muscular nerve fibres nobilis noble crayfish nucleated cells nuclei organs ossicle outer pairs plate pleura podobranchiæ portion posterior prawns present region ridge rostrum segments septal lines setæ side somite species spermatozoa spines sternal sternum stomach structure substance surface swimmerets telson tergal tergum terminal thoracic thoracic limbs thoracic somite tissue transverse wall yelk zone