Zoology for High Schools and CollegesHenry Holt and Company, 1883 - 719 páginas |
Otras ediciones - Ver todas
Zoology for High Schools and Colleges: Second Edition Alpheus Spring Packard Sin vista previa disponible - 2017 |
Zoology for High Schools and Colleges (Classic Reprint) A. S. Packard Sin vista previa disponible - 2017 |
Términos y frases comunes
abdomen adult allied ambulacral animals Annelides Antedon antennæ appendages arise arms arteries Ascidian auricle becomes birds body body-cavity bones bony fishes Brachiopods brain branches branchial budding cavity cells ciliated cloaca coral Crustacea developed digestive canal disk dissecting dorsal Echinoderms ectoderm eggs embryo eyes feet female fins ganglia ganglion gastrula Gegenbaur germ gills glands hatched head heart hind Hydroids insects intestine jaws lancelet larva larvæ layer legs limbs Linn liver living lobes lungs male mammals mass maxillæ membrane metamorphosis metres millimetres mollusks morula mouth muscles nerves nervous system notochord oesophagus opening Order organs ovary oviduct pairs pass pharynx plates polyps posterior represented reptiles resemblance seen segments shell side situated skin skull species spines spiracles stage star-fish stomach suborder tail teeth tentacles thorax trachea tubes usually ventral ventricle vertebral column Vertebrates vesicle vessels viviparous water-vascular wings worms young
Pasajes populares
Página 628 - He is plantigrade; has five toes; separate tarsals and carpals; short heel; flat astragalus, and neither hoofs nor claws, but something between the two; the bones of the forearm and leg are not so unequal as in the higher types, and remain entirely distinct from each other, and the ankle joint is not so perfect as in many of them.
Página 682 - If we suppose any habitual action to become inherited — and it can be shown that this does sometimes happen — then the resemblance between what originally was a habit and an instinct becomes so close as not to be distinguished.
Página 625 - It must not be overlooked, however, that there is a very striking difference in absolute mass and weight between the lowest human brain and that of the highest ape — a difference which is all the more remarkable when we recollect that a fullgrown gorilla is probably pretty nearly twice as heavy as a Bosjes man, or as many an European woman.
Página 207 - Phoronis, Echinus, etc. The first point of difference from other animals in the development of .all vertebrates is seen in the formation of the dorsal ridges and their closing to form a nerve-canal. This mode of formation of the nervous system is characteristic of the vertebrates alone, except the Ascidians. Another primary character allying the Ascidians to the vertebrates, is the presence of a chorda dorsalis, first seen in the adult Appendicularia by J.
Página 579 - His fur has so much the hue of the moss which grows on the branches of the trees, that it is very difficult to make him out when he is at rest.
Página 552 - They represent the highest grade of physiological development, as well as the most perfect physical organization of the class of birds. Their nervous irritability is great, coordinate with the rapidity of their respiration and circulation ; they consume the most oxygen, and live the fastest, of all birds.
Página 444 - ... season, and thus the sexes are mutually attracted in the one case by music, and in the other by bright colors. Finally the sounds of fishes may be said to be homologous with those of reptiles, birds and mammals, the air-bladder being homologous with the lungs of the higher Vertebrates, while the pneumatic duct is comparable with the trachea of birds and mammals.