The Science of Life, Volumen 4Cassell, 1931 - 896 páginas |
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Página 30
... seen as a tangle of filaments and granules , will be described later on in connexion with cell- division . For the present its interest lies in the fact that it seems to be a region where mitochondria are made ; they can be seen ...
... seen as a tangle of filaments and granules , will be described later on in connexion with cell- division . For the present its interest lies in the fact that it seems to be a region where mitochondria are made ; they can be seen ...
Página 96
... seen. body is nude , except for scattered fine hairs , or lanugo . In both , the embryonic lanugo is succeeded by a general outgrowth of fully developed hair , but in man this out- growth is much slighter than in an ape . Man's naked ...
... seen. body is nude , except for scattered fine hairs , or lanugo . In both , the embryonic lanugo is succeeded by a general outgrowth of fully developed hair , but in man this out- growth is much slighter than in an ape . Man's naked ...
Página 185
... seen , a limit imposed not by any fault of the lens - grinders but by a property of light itself . We know that we shall never be able to see distinctly anything less than one four - thousandth of a millimetre across ( one hundred ...
... seen , a limit imposed not by any fault of the lens - grinders but by a property of light itself . We know that we shall never be able to see distinctly anything less than one four - thousandth of a millimetre across ( one hundred ...
Índice
THE RANGE NATURE AND STUDY OF LIVING THINGS | 3 |
66 | 5 |
muscles and related | 8 |
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Términos y frases comunes
active algæ animals arthropods bacteria become birds blood body bones brain branches called capillaries carbon carbon dioxide cells Cenozoic changes chemical chromosomes colour creatures crustaceans digestive Echinoderms eggs elaborate embryo Eocene Everyman evolution example eyes fact female fertilized fish flatworms flowers fluid forms fossils gametes genes germ-plasm glands grow growth heart human Ichthyosaurs important individual insects intestine kidneys kinds land larvæ layer less limbs liver living things lobster lungs male mammals marsupials matter means ment microscopic million molluscs mouse mouth movements muscles mutations nervous system normal notochord Obelia organs ovary ovum oxygen pair parasitic phylum plants polyps produced proteins prothallus protozoa reproduction reptiles round secretion sense-organs sexual shell skeleton skin species spermatozoa sperms spores stage starfish stomach structure substances surface swim tail teeth thyroid tiny tion tissue to-day tube types variations various vertebrates whole worms