Principles of Zoölogy : Touching the Structure, Development, Distribution, and Natural Arrangement of the Races of Animals, Living and Extinct with Numerous Illustrations: Part 1, Comparative Physiology : for the Use of Schools and CollegesGould and Lincoln, 1860 - 250 pagina's |
Vanuit het boek
Resultaten 1-5 van 20
Pagina 39
... extremities , and form loops , as shown in figure 6 , representing nervous threads as they terminate in the skin of a frog . The same fibrous structure Fig . 6 . Fig . 7 . is found in the white portion of the brain . But the gray ...
... extremities , and form loops , as shown in figure 6 , representing nervous threads as they terminate in the skin of a frog . The same fibrous structure Fig . 6 . Fig . 7 . is found in the white portion of the brain . But the gray ...
Pagina 53
... extremity of the rays of some of the star - fishes , in the sea - urchins , at the mar- gin of many Medusæ , and in some Polypi . Ehrenberg has shown that similar spots also exist in a large number of the Infusoria . * Fig . 17 . 87. In ...
... extremity of the rays of some of the star - fishes , in the sea - urchins , at the mar- gin of many Medusæ , and in some Polypi . Ehrenberg has shown that similar spots also exist in a large number of the Infusoria . * Fig . 17 . 87. In ...
Pagina 62
... extremities of the nerves generally terminate in little asperities of the surface , called papilla . Sometimes these papillæ are very harsh , as in the cat and the ox ; and again they are very delicate , as in the human tongue , in that ...
... extremities of the nerves generally terminate in little asperities of the surface , called papilla . Sometimes these papillæ are very harsh , as in the cat and the ox ; and again they are very delicate , as in the human tongue , in that ...
Pagina 70
... extremity of some slender , inaccessible twig , is familiar to all . The beautiful nest of the humming- bird , seated on a mossy bough , and itself coated with lichen and lined with the softest down from the cotton - grass or the ...
... extremity of some slender , inaccessible twig , is familiar to all . The beautiful nest of the humming- bird , seated on a mossy bough , and itself coated with lichen and lined with the softest down from the cotton - grass or the ...
Pagina 80
... extremities of the body , a cup or some other organ for maintaining a firm hold , each extremity acting in turn as a fixed point . Thus the Leech has a cup or sucker at its tail , by which it fixes itself ; the body is then elongated by ...
... extremities of the body , a cup or some other organ for maintaining a firm hold , each extremity acting in turn as a fixed point . Thus the Leech has a cup or sucker at its tail , by which it fixes itself ; the body is then elongated by ...
Veelvoorkomende woorden en zinsdelen
allantois American Ammonites Animal Kingdom appearance aquatic Articulates become belong birds bivalve blood body bones brain branches called canal carboniferous cartilaginous cavity cells Cercaria chyle classes cloth composed containing crabs Cretaceous Crinoids crustaceans crystalline lens cuttle-fish digestive distinct Distoma distribution earth Echinoderms eggs embryo epoch fauna fishes fluid formation fossils frog furnished Gasteropods genera geological germ germinative germinative vesicle gills head Illustrations important Infusoria insects intestine jaws jelly-fishes layer legs less limbs living lower lungs magnified mals mammals membrane metamorphoses mode mollusks monkey muscles namely natural nerves nervous system Palæozoic peculiar perfect period plants Polyps portion Radiates regions reproduction reptiles resemblance respiration respiratory organs Rhizodonts rocks SECTION shell showing Silurian similar skin species star-fishes stomach structure surface teeth temperate tentacles terrestrial animals Tertiary tion tissues Trilobites tropical types vegetable vesicle Whale White-fish whole worms yolk young zone Zoology
Populaire passages
Pagina 122 - ... (243.) 258. The production of animal heat is obviously connected with the respiratory process. The oxygen of the respired air is diminished, and carbonic acid takes its place. The carbonic acid is formed in the body by the combination of the oxygen of the air with the carbon of the blood. The chemical combination attending this function is, therefore, essentially the same as that of combustion. It is thus easy to understand how the natural heat of an animal is greater, in proportion as respiration...
Pagina 5 - The design of this work is to furnish an epitome of the leading principles of the science of Zoology, as deduced from the present state of knowledge, so illustrated as to be intelligible to the beginning student. No similar treatise now exists in this country, and indeed, some of the topics have not been touched upon in the language, unless in a strictly technical form, and in scattered articles.
Pagina 237 - But this connection is not the consequence of a direct lineage between the faunas of different ages. There is nothing like parental descent connecting them. The Fishes of the Palaeozoic age are in no respect the ancestors of the Reptiles of the...
Pagina 50 - This is called the vitreous humor, (h.) 77. The object of this apparatus is to receive the rays of light, which diverge from all points of bodies placed before it, and to bring them again to a point upon the retina. It is a well-known fact, that when a ray of light passes obliquely from one medium to another of different density...
Pagina 25 - ... adaptation to the supply of our wants ; but the Animal Kingdom, as a whole, has a still higher signification. It is the exhibition of the divine thought, as carried out in one department of that grand whole which \ve call Nature ; and considered as such, it teaches us most important lessons.
Pagina 238 - The link by which they are connected is of a higher and immaterial nature ; and their connection is to be sought in the view of the Creator himself, whose aim in forming the earth, in allowing it to undergo the successive changes which geology has pointed out, and in creating successively all the different types of animals which have passed away, was to introduce man upon the surface of our globe. MAN is THE END TOWARDS WHICH ALL THE ANIMAL CREATION HAS TENDED FROM THE FIRST APPEARANCE OF THE FIRST...