Get A Functional Biology of Scyphozoa PDF

By Mary N. Arai (auth.)

ISBN-10: 9400914970

ISBN-13: 9789400914971

ISBN-10: 9401071691

ISBN-13: 9789401071697

Scyphozoa have attracted the eye of many varieties of individuals. Naturalists watch their swish locomotion. Fishermen may possibly dread the swarms that could hinder fishing or consume larval fish. Bathers retreat from the water in the event that they are stung. humans from a few Asiatic nations devour the medusae. Comparative physiologists research them as probably uncomplicated versions for the functioning of assorted structures. This ebook integrates info from these and different investigations right into a useful biology of scyphozoa. it's going to emphasize the wide variety of adaptive responses attainable in those morphologically rather easy animals. The booklet will be aware of the study of the final 35 years, in part simply because there was a swift growth of data in the course of that interval, and partially simply because a lot of the former paintings was once summarized through books released among 1961 and 1970. Bibliographies of papers on scyphozoa have been incorporated in Mayer (1910) and Kramp (1961). Taxonomic diagnoses also are incorporated in these monographs, in addition to in a monograph at the scyphomedusae of the USSR released via Naumov (Naumov, 1961). so much impor­ tantly, a genenttion of scyphozoan staff has used as its 'bible' the monograph through F.S.Russell (1970) The Medusae of the British Isles. regardless of its restrictive name, his booklet experiences lots of the info at the biology of scyphozoa as much as that date.

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The smaller one is formed of a cup of pigmented endodermal cells surrounding a projection of cells from the ectoderm. Aboral ocelli are present on the rhopalia of Cassiopea xamachana (but not in C. frondosa) (see Bouillon and Nielsen, 1974). In the Stauromedusae, pigment spots are present on the oral surfaces of polyps of the genus Stylocoronella (see Salvini-Plawen, 1966, 1987). No lenses have been observed in these orders. A few coronate species possess more complex ocelli. Lenses have been observed in Nausithoe punctata (see Hertwig and Hertwig, 1878).

The smaller one is formed of a cup of pigmented endodermal cells surrounding a projection of cells from the ectoderm. Aboral ocelli are present on the rhopalia of Cassiopea xamachana (but not in C. frondosa) (see Bouillon and Nielsen, 1974). In the Stauromedusae, pigment spots are present on the oral surfaces of polyps of the genus Stylocoronella (see Salvini-Plawen, 1966, 1987). No lenses have been observed in these orders. A few coronate species possess more complex ocelli. Lenses have been observed in Nausithoe punctata (see Hertwig and Hertwig, 1878).

3 MUSCLE Contraction of muscle cells depends on the relative movement of protein filaments which may be organized into intracellular myofibrils. The contractile myofibrils of scyphozoa are usually contained within epitheliomuscular cells. 9). The basal processes may be directly attached to the cell body or be attached only by long thin connecting processes. Myofibrils may also run up through the cell body toward the outer surface of the cell. e. they are not epithelial. They become more filiform with an elongated cell body lying adjacent to the myofibril.

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A Functional Biology of Scyphozoa by Mary N. Arai (auth.)


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