The Whence and the Whither of Man: A Brief History of His Origin and Development Through Conformity to Environment; Being the Morse Lectures of 1895W. Blackwood and Sons, 1896 - 312 pagine |
Dall'interno del libro
Risultati 1-5 di 35
Pagina 33
... surface . Its mode of gaining the en- ergy which it manifests is therefore apparently like our own , by com- bustion of food mate- rial . and reaches It grows and reaches a certain size , then con- stricts itself in the mid- N. .ek ...
... surface . Its mode of gaining the en- ergy which it manifests is therefore apparently like our own , by com- bustion of food mate- rial . and reaches It grows and reaches a certain size , then con- stricts itself in the mid- N. .ek ...
Pagina 35
... surface four times , its mass eight - fold . Now of absorbing oxygen and excreting waste is the power evidently proportional to the excretory and respiratory surface , and much the same is true of digestion . But the amount of oxygen ...
... surface four times , its mass eight - fold . Now of absorbing oxygen and excreting waste is the power evidently proportional to the excretory and respiratory surface , and much the same is true of digestion . But the amount of oxygen ...
Pagina 36
... surface by folding and plaiting . And the complicated internal structure of higher ani- mals is in its last analysis such a folding and plaiting in order to maintain the proper ratio between the ex- posed surface of the cells and their ...
... surface by folding and plaiting . And the complicated internal structure of higher ani- mals is in its last analysis such a folding and plaiting in order to maintain the proper ratio between the ex- posed surface of the cells and their ...
Pagina 37
... surface of the water or to slowly creep on the bottom . The mouth is at the top of the vase , and the simple , undi- vided cavity within the vase is the digestive cavity . Around the mouth is a ring of from four to ten hollow tentacles ...
... surface of the water or to slowly creep on the bottom . The mouth is at the top of the vase , and the simple , undi- vided cavity within the vase is the digestive cavity . Around the mouth is a ring of from four to ten hollow tentacles ...
Pagina 38
... surface of the elastic supporting The reproductive organs for the production of eggs and spermatozoa form little protuberances on the out- side of the body below the tentacles . But hydra re- produces mostly by budding ; new individuals ...
... surface of the elastic supporting The reproductive organs for the production of eggs and spermatozoa form little protuberances on the out- side of the body below the tentacles . But hydra re- produces mostly by budding ; new individuals ...
Altre edizioni - Visualizza tutto
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1896 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1897 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1899 |
Parole e frasi comuni
amoeba amphibia anatomical ancestors animal kingdom annelid apes appear appetite attained become birds body brain cavity cells cerebrum Cheaper Edition church conformity to environment conscious Crown 8vo degeneration Demy 8vo digestive dominant ectoderm embryo evolution experience eyes Fcap fish functions ganglion gastrula germ-plasm give groups higher forms highest human hydra Illustrations increase individual insect instinct intelligence laws layer legs living locomotion lower mammals man's marsupial ment mental mind mode modified mollusks moral muscles muscular natural selection nerve nervous system never notochord nutriment organs oxygen parapodia perception perivisceral Portrait Post 8vo primitive probably Professor progress protoplasm protozoa purely reflex action reproductive reptiles result schematic worm Scotland segments selfish sense-organs sequence skeleton species stage structure struggle surface survive swimming theory tion true truth turbellaria University of Edinburgh variation velopment vertebral column vertebrates vols volvox WHITHER young