Animal Life: A First Book of ZoölogyD. Appleton, 1900 - 329 páginas |
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Página 7
... digested are thrust out of the body . The Amoeba breathes . Though we can not readily ob- serve this act of respiration , it is true that the Amaba takes into its body through any part of its surface oxygen from the air which is mixed ...
... digested are thrust out of the body . The Amoeba breathes . Though we can not readily ob- serve this act of respiration , it is true that the Amaba takes into its body through any part of its surface oxygen from the air which is mixed ...
Página 39
... digested by the cells lining this cavity . These cells belonging to the inner layer of the body wall or endoderm are mostly large , and each contains one or more contractile vacuoles . From the free ends - the ends which are next to the ...
... digested by the cells lining this cavity . These cells belonging to the inner layer of the body wall or endoderm are mostly large , and each contains one or more contractile vacuoles . From the free ends - the ends which are next to the ...
Página 66
... The alimentary canal . - The organ which has to do with the taking and digesting of food is called the ali- mentary canal . In some of the higher animals this 66 ANIMAL LIFE -The specialization of organs, 66 -The alimentary canal, 66.
... The alimentary canal . - The organ which has to do with the taking and digesting of food is called the ali- mentary canal . In some of the higher animals this 66 ANIMAL LIFE -The specialization of organs, 66 -The alimentary canal, 66.
Página 68
... digested food ) and pass it through the walls of the intestine to other special organs , which pass it on to the blood , with which it becomes mixed and carried by an elaborate system of tubes to all parts of the body . Part of the ...
... digested food ) and pass it through the walls of the intestine to other special organs , which pass it on to the blood , with which it becomes mixed and carried by an elaborate system of tubes to all parts of the body . Part of the ...
Página 72
... digested . Behind the stomach is a long , much - folded , nar- row intestine which winds about through the fleshy " foot " and finally reaches the surface of the body , and has an anal opening at a point opposite the position of the ...
... digested . Behind the stomach is a long , much - folded , nar- row intestine which winds about through the fleshy " foot " and finally reaches the surface of the body , and has an anal opening at a point opposite the position of the ...
Outras edições - Ver tudo
Animal Life: A First Book of Zoölogy David Starr Jordan,Vernon Lyman Kellogg Visualização integral - 1900 |
Animal Life: A First Book of Zoölogy David Starr Jordan,Vernon Lyman Kellogg Visualização integral - 1912 |
Animal Life: A First Book of Zoölogy David Starr Jordan,Vernon Lyman Kellogg Visualização integral - 1900 |
Palavras e frases frequentes
adaptation alimentary canal Amaba ants auditory barriers become bees birds body butterfly California called caterpillars cavity chitinous CLASS colony color common complex animals composed conjugation crab crustaceans differentiation digestive divide division ectoderm egg cells eyes fauna feed female fishes flagella free-swimming function habits hatched higher animals Hydra inclosed individuals insects instinct islands jelly-fishes kinds of animals larva larvæ layer live lower male mals mammals many-celled animals mass medusæ mimicry Monarch butterfly moth naturalists nerve nest nucleus ocean one-celled outer Pandorina papillæ Paramecium parasites parent plants polyp possess prey primitive processes produced protective resemblance protoplasm Protozoa pseudopods Radiolaria realm reflex action region reproductive cells River Sacculina simple simplest animals single cell smell special senses species sperm cells spherical spiders sponge stage streams structure substance surface swim tentacles tion trout vertebrates Volvox Vorticella wall wings worms young
Passagens conhecidas
Página 115 - There is no exception to the rule that every organic being naturally increases at so high a rate, that, if not destroyed, the earth would soon be covered by the progeny of a single pair. Even slow-breeding man has doubled in twenty-five years, and at this rate, in less than a thousand years, there would literally not be standing room for his progeny.
Página 88 - Fig. 145 are indistinguishably alike, but one embryo is sure to develop into a fish and the other into a salamander. This certainty of an embryo to become an individual of a certain kind is called the law of heredity.
Página 215 - He cannot be mistaken for any other, and his flaming vest and blue stockings show that he does not court concealment. He is very abundant in the damp woods, and I was convinced he was uneatable so soon as I made his acquaintance and saw the happy sense of security with which he hopped about. I took a few specimens home with me, and tried my fowls and ducks with them ; but none would touch them. At last, by throwing down pieces of meat, for which there was a great competition amongst them, I managed...
Página 164 - Russian naturalist, of the hunting habits of the great white-tailed eagle (Haliattos albicilla) on the Russian steppes shows that this kind of eagle at least has adopted a gregarious habit, in which mutual help is plainly obvious. This naturalist once saw an eagle high in the air, circling slowly and widely in perfect silence. Suddenly the eagle screamed loudly. " Its cry was soon answered by another eagle, which approached it, and was followed by a third, a fourth, and so on, till nine or ten eagles...