An Introduction to the Study of Zoology, Illustrated by the CrayfishAppleton, 1906 - 371 pagini |
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Pagina 66
... cells , which are particles of simple living matter , or protoplasm , in the midst of each of which is a rounded body , which is termed the nucleus . It is these cells which are the seat of the manufacturing process which results in the ...
... cells , which are particles of simple living matter , or protoplasm , in the midst of each of which is a rounded body , which is termed the nucleus . It is these cells which are the seat of the manufacturing process which results in the ...
Pagina 67
... cells , at the summit of the cæca , these are either absent , or very small , whence the part appears colourless . But , lower down , small yellow granules appear in the cells , and these become bigger and more numerous in the middle ...
... cells , at the summit of the cæca , these are either absent , or very small , whence the part appears colourless . But , lower down , small yellow granules appear in the cells , and these become bigger and more numerous in the middle ...
Pagina 103
... or nerve cells ( fig . 24 , B. ) These are nucleated cells , not unlike the epithelial cells which have been already mentioned , but which are larger an an . gn.1 -sgn œes -gn.2 sa gn.6 gn.7-. NERVE FIBRES AND NERVE CELLS . 103.
... or nerve cells ( fig . 24 , B. ) These are nucleated cells , not unlike the epithelial cells which have been already mentioned , but which are larger an an . gn.1 -sgn œes -gn.2 sa gn.6 gn.7-. NERVE FIBRES AND NERVE CELLS . 103.
Pagina 131
... ovisac . and the testis assumes a milk - white colour , at this period . The walls of the ovary are lined internally by a layer of nucleated cells , separated from the cavity of the organ. THE OVARY AND THE EGGS . 131.
... ovisac . and the testis assumes a milk - white colour , at this period . The walls of the ovary are lined internally by a layer of nucleated cells , separated from the cavity of the organ. THE OVARY AND THE EGGS . 131.
Pagina 132
Thomas Henry Huxley. nucleated cells , separated from the cavity of the organ by a delicate structureless membrane . The growth of these cells gives rise to papillary elevations which project into the cavity of the ovary , and eventually ...
Thomas Henry Huxley. nucleated cells , separated from the cavity of the organ by a delicate structureless membrane . The growth of these cells gives rise to papillary elevations which project into the cavity of the ovary , and eventually ...
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