An Introductory Text-book of Zoology for the Use of Junior ClassesW. Blackwood, 1875 - 224 páginas |
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Página 36
... tentacles , and the disc of attachment ; the dark and light lines indicate the two layers of the integument , and on one side of the body is shown a single large egg . The mouth opens directly into the general cavity of the body ...
... tentacles , and the disc of attachment ; the dark and light lines indicate the two layers of the integument , and on one side of the body is shown a single large egg . The mouth opens directly into the general cavity of the body ...
Página 38
... tentacles . " The tentacles consist of tubular prolongations of both the outer and inner layers of the body , 38 INVERTEBRATE ANIMALS .
... tentacles . " The tentacles consist of tubular prolongations of both the outer and inner layers of the body , 38 INVERTEBRATE ANIMALS .
Página 39
... tentacles are the organs by which the Hydra catches its food , in which operation they not only act mechanically , seizing the prey and conducting it to the mouth , but they appear also to exercise a benumbing influence upon the animals ...
... tentacles are the organs by which the Hydra catches its food , in which operation they not only act mechanically , seizing the prey and conducting it to the mouth , but they appear also to exercise a benumbing influence upon the animals ...
Página 44
... tentacles , one consisting of numerous short tentacles placed directly round the mouth , whilst the other is composed of from thirty to forty filaments of much greater length , arising from the polypite about its middle or near the base ...
... tentacles , one consisting of numerous short tentacles placed directly round the mouth , whilst the other is composed of from thirty to forty filaments of much greater length , arising from the polypite about its middle or near the base ...
Página 45
... chamber , which is both body - cavity and stomach , and having at one end a mouth sur- rounded by a circlet of tentacles ( fig . 18 , 6 ) . At its lower end 46 the body - cavity opens into a tubular cavity HYDROID ZOOPHYTES . 45.
... chamber , which is both body - cavity and stomach , and having at one end a mouth sur- rounded by a circlet of tentacles ( fig . 18 , 6 ) . At its lower end 46 the body - cavity opens into a tubular cavity HYDROID ZOOPHYTES . 45.
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An Introductory Text-Book of Zoology - For the Use of Junior Classes Henry Alleyne Nicholson Pré-visualização indisponível - 2010 |
Palavras e frases frequentes
abdomen Actinozoa alimentary canal Amaba amongst Annelides antennæ apertures Birds body body-cavity bones bony breathing-organs buds called Carnivora cavity chambers cilia colony common composed comprising consists constitute Corals Crown 8vo Crustaceans Ctenophora digestive disc distinct divided Edition eggs fact feet filaments fins fishes fluid foot Foraminifera functions furnished GEOGRAPHY Geology gills head hind horny Hydra Hydroid Hydroid Zoophytes Hydrozoa Infusoria inhabit Insects integument jaws Jelly-fishes kind known Lancelet larvæ layer legs limbs living locomotive Mammals membranous microscopic Molluscs mouth nervous system organs outer pair Paramecium perforated placed plants polypes polypite possess pous present produced protoplasm Protozoa pseudopodia reproductive Rhizopoda Scolecida Sea-anemones Sea-pens Sea-urchins Sertularian shell skeleton skin sometimes species sponge stomach structure sub-kingdom substances surface swim tail teeth tentacles termed thread-cells toes tube usually vertebral column Vertebrata Vertebrate animals Vorticella whilst wings Zoophytes
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