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 37
... sometimes separate them from each other are called intercellular passages or spaces ( m . ) When the cellules are very numerous , and crowd each other , their outlines become angular , and the intercel- lular spaces disappear , as seen ...
... sometimes separate them from each other are called intercellular passages or spaces ( m . ) When the cellules are very numerous , and crowd each other , their outlines become angular , and the intercel- lular spaces disappear , as seen ...
Pagina 38
... Sometimes the nucleus itself contains a still smaller dot , called nucleolus , ( b . ) Fig . 3 . 39. The elementary structure of vegetables may be ob served in every part of a plant , and its cellular character has been long known . But ...
... Sometimes the nucleus itself contains a still smaller dot , called nucleolus , ( b . ) Fig . 3 . 39. The elementary structure of vegetables may be ob served in every part of a plant , and its cellular character has been long known . But ...
Pagina 39
... sometimes radiated and branched , as is seen in figure 5 , representing a section of a bone of a horse , magnified four hundred times . 00000000 000000 000000 00 000 000 000 Fig . 4 . Fig . 5 . flesh of ani- 44. The muscular tissue ...
... sometimes radiated and branched , as is seen in figure 5 , representing a section of a bone of a horse , magnified four hundred times . 00000000 000000 000000 00 000 000 000 Fig . 4 . Fig . 5 . flesh of ani- 44. The muscular tissue ...
Pagina 49
... Sometimes the pupil is circular , as in man , the dog , the monkey ; sometimes in the form of a vertical ellipse , as in the cat ; or it is elongated sidewise , as in the sheep . 74. The third membrane is the retina , ( d . ) It is ...
... Sometimes the pupil is circular , as in man , the dog , the monkey ; sometimes in the form of a vertical ellipse , as in the cat ; or it is elongated sidewise , as in the sheep . 74. The third membrane is the retina , ( d . ) It is ...
Pagina 61
... sometimes arranged in parallel ridges on each side of a central band . As the perfection of smell depends on the amount of surface exposed , it follows that those fishes which have these folds most multiplied are also those in which ...
... sometimes arranged in parallel ridges on each side of a central band . As the perfection of smell depends on the amount of surface exposed , it follows that those fishes which have these folds most multiplied are also those in which ...
Overige edities - Alles bekijken
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...