Principles of Zoölogy : Touching the Structure, Development, Distribution, and Natural Arrangement of the Races of Animals, Living and Extinct with Numerous Illustrations: Part I, Comparative Physiology, for the Use of Schools and CollegesGould and Lincoln, 1859 - 250 pagina's |
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Pagina 31
... passes from a lower to a higher state . Clearly , therefore , animals resembling the caterpillar , the worms , for instance , must occupy a lower rank than those approaching the butterfly , like most insects . There is no animal which ...
... passes from a lower to a higher state . Clearly , therefore , animals resembling the caterpillar , the worms , for instance , must occupy a lower rank than those approaching the butterfly , like most insects . There is no animal which ...
Pagina 38
... pass into each other by insensible shades . Their modifications are still the subject of investigation , and we refer only to the most important distinctions . 41. The areolar tissue consists of a network of delicate fibres ...
... pass into each other by insensible shades . Their modifications are still the subject of investigation , and we refer only to the most important distinctions . 41. The areolar tissue consists of a network of delicate fibres ...
Pagina 50
... passes obliquely from one medium to another of different density , it will be refracted or turned out of its course ... passing through the crystalline lens C D , and the vitreous humor , so that the two rays , m i and n f , will at last ...
... passes obliquely from one medium to another of different density , it will be refracted or turned out of its course ... passing through the crystalline lens C D , and the vitreous humor , so that the two rays , m i and n f , will at last ...
Pagina 61
... pass over the pituitary membrane . 109. The acuteness of the sense of smell depends on the extent to which the membrane is developed . Man is not so well endowed in this respect as many animals , which have the internal surface of the ...
... pass over the pituitary membrane . 109. The acuteness of the sense of smell depends on the extent to which the membrane is developed . Man is not so well endowed in this respect as many animals , which have the internal surface of the ...
Pagina 65
... passes the vocal cords . So long as these are in repose , no sound is produced ; but the moment they are made tense they narrow the aperture , and oppose an obstacle to the current of air , and it 6 * OF THE VOICE . 65 Of the Voice.
... passes the vocal cords . So long as these are in repose , no sound is produced ; but the moment they are made tense they narrow the aperture , and oppose an obstacle to the current of air , and it 6 * OF THE VOICE . 65 Of the Voice.
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Veelvoorkomende woorden en zinsdelen
albumen allantois Ammonites Animal Kingdom appear aquatic arteries Articulata Articulates auricles become belong birds blood body bones brain branches called canal carboniferous Carnivora cartilaginous cavity cells Cercaria chyle classes cloth composed contains corresponding crabs crustaceans crystalline lens cuttle-fish digestive distinct Distoma distribution divided Echinoderms eggs embryo enclosed epoch fauna fishes fluid formation fossils frog furnished Gasteropods geological germ germinative germinative vesicle gills head heart Illustrations important Infusoria insects intestine jaws jelly-fishes layer less limbs living lower lungs magnified mals mammals membrane metamorphoses mode mollusks muscles namely natural nerves nervous system oxygen peculiar period plants polyps portion Radiates regions reptiles resemblance respiration respiratory organs Rhizodonts rocks SECTION shell showing Silurian similar skin species star-fishes structure surface teeth temperate tentacles terrestrial animals Tertiary tion tissues trachea tropical types upper vegetative ventricle vertebrated animals vesicle White-fish whole worms yolk young Zoology
Populaire passages
Pagina 189 - Experiments of dredging in very deep water have also taught us that the abyss of the ocean is nearly a desert. Not only are no materials found there for sustenance, but it is doubtful if animals could sustain the pressure of so great a column of water, although many of them are provided with a system of pores, (260,) which enables them to sustain a much greater pressure than terrestrial animals. America, one species takes...