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 11
... layers of the earth's crust . The four Ages of Nature , mentioned at page 221 , are represented by four zones , of different shades , each of which is subdivided by circles , indicating the number of formations of which they are ...
... layers of the earth's crust . The four Ages of Nature , mentioned at page 221 , are represented by four zones , of different shades , each of which is subdivided by circles , indicating the number of formations of which they are ...
Pagina 14
... layer of the germ . 103. Separation of the cell - layer into three layers ; s , serous or nervous layer ; m , mucous or vegetative layer ; v , vascular or blood layer . 104. Embryo of a crab , showing its incipient rings . 105. Embryo ...
... layer of the germ . 103. Separation of the cell - layer into three layers ; s , serous or nervous layer ; m , mucous or vegetative layer ; v , vascular or blood layer . 104. Embryo of a crab , showing its incipient rings . 105. Embryo ...
Pagina 15
... layers , the serous layer , ( s , ) and the mucous layer , ( m . ) 130. The mucous layer ( m ) expands over nearly half of the yolk , and be- comes covered with many little fringes . 131. The embryo ( e ) is seen surrounded by the ...
... layers , the serous layer , ( s , ) and the mucous layer , ( m . ) 130. The mucous layer ( m ) expands over nearly half of the yolk , and be- comes covered with many little fringes . 131. The embryo ( e ) is seen surrounded by the ...
Pagina 38
... layers of various thickness , between all parts of the body , and frequently accompanied by clusters of fat cells . The fibrous and the serous membranes are mere modifications of this tissue . 42 The cartilaginous tissue is composed of ...
... layers of various thickness , between all parts of the body , and frequently accompanied by clusters of fat cells . The fibrous and the serous membranes are mere modifications of this tissue . 42 The cartilaginous tissue is composed of ...
Pagina 44
... layers of the embryonic membrane . The first are developed from the upper layer , and the second from the lower layer of the germ of the animal . See Chapter on Embryology , p . 112 . 61. Greatly as the form , the arrangement , and 60 ...
... layers of the embryonic membrane . The first are developed from the upper layer , and the second from the lower layer of the germ of the animal . See Chapter on Embryology , p . 112 . 61. Greatly as the form , the arrangement , and 60 ...
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...