The Science of Life, Volumen 4Cassell, 1931 - 896 páginas |
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Página 54
... digestive tranquillity . The small intestine is a tube about an inch across and some twenty feet long , which forms an intricate coiling mass in the abdomen . The whole tube is very uniform in its minute structure , but physio ...
... digestive tranquillity . The small intestine is a tube about an inch across and some twenty feet long , which forms an intricate coiling mass in the abdomen . The whole tube is very uniform in its minute structure , but physio ...
Página 140
... digestive tubes in black ( mag- nified about six times ) . of the same host ; and many of these are very trou- blesome in- deed to man . § 6 Flatworms or The Platy- helminthes flatworms are for the most part parasitic . Their organ ...
... digestive tubes in black ( mag- nified about six times ) . of the same host ; and many of these are very trou- blesome in- deed to man . § 6 Flatworms or The Platy- helminthes flatworms are for the most part parasitic . Their organ ...
Página 406
... digestive cavity with only one aperture and no packing between its wall and the skin . ( C ) A simple flatworm . The digestive cavity still has only one aperture , but it is separated from the body - wall by a packing of connective ...
... digestive cavity with only one aperture and no packing between its wall and the skin . ( C ) A simple flatworm . The digestive cavity still has only one aperture , but it is separated from the body - wall by a packing of connective ...
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