Results 171 to 180 of about 23,920 (215)
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Biological Reviews, 1972
SummaryDuring the past ten years much information has been added to our knowledge of nerve and muscle systems of echinoderms.1. Electron‐microscopy has shown that all the main nerve trunks consist of large numbers of small, parallel‐running unmyelinated axons which are packed tightly together. Glial cells are generally absent.
V W, Pentreath, J L, Cobb
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SummaryDuring the past ten years much information has been added to our knowledge of nerve and muscle systems of echinoderms.1. Electron‐microscopy has shown that all the main nerve trunks consist of large numbers of small, parallel‐running unmyelinated axons which are packed tightly together. Glial cells are generally absent.
V W, Pentreath, J L, Cobb
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Zootaxa, 2007
The Phylum Echinodermata, comprising approximately 7,000 living species, and 13,000 fossil species, is epitomized by the familiar sea star, a universal symbol of the marine realm. This distinctive group of animals may be briefly defined as possessing a skeleton of calcium carbonate in the form of calcite; a unique water-vascular system which mediates ...
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The Phylum Echinodermata, comprising approximately 7,000 living species, and 13,000 fossil species, is epitomized by the familiar sea star, a universal symbol of the marine realm. This distinctive group of animals may be briefly defined as possessing a skeleton of calcium carbonate in the form of calcite; a unique water-vascular system which mediates ...
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1989
The Echinodermata are certainly one of the most unusual and interesting phyla from the biomineralization point of view. They all live in the marine environment. The five major taxonomic classes (Asteroidea or sea stars, Ophiuroidea or brittle stars, Echinoidea or sea urchins, Crinoidea or sea lilies, and Holothuroidea or sea cucumbers) have quite ...
J. D. Fish, S. Fish
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The Echinodermata are certainly one of the most unusual and interesting phyla from the biomineralization point of view. They all live in the marine environment. The five major taxonomic classes (Asteroidea or sea stars, Ophiuroidea or brittle stars, Echinoidea or sea urchins, Crinoidea or sea lilies, and Holothuroidea or sea cucumbers) have quite ...
J. D. Fish, S. Fish
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1990
Abstract Most echinoderms have a distinctive radial pattern which may take the form of five arms radiating from a central disk (Fig. 15. I) or a more globular or cylindrical shape, again with structures arranged in five rows (or multiples of five) (Fig. 15.2).
J Moyse, P A Tyler
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Abstract Most echinoderms have a distinctive radial pattern which may take the form of five arms radiating from a central disk (Fig. 15. I) or a more globular or cylindrical shape, again with structures arranged in five rows (or multiples of five) (Fig. 15.2).
J Moyse, P A Tyler
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2017
This chapter describes the taxonomy of Echinodermata, a diverse group of organisms consisting systematically of five classes including sea stars (Asteroidea), brittle stars (Ophiuroidea), sea urchins (Echinoidea), sea cucumbers (Holothuroidea), and feather stars (Crinoidea). It covers their life cycle, ecology, and general morphology.
David V.P. Conway +2 more
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This chapter describes the taxonomy of Echinodermata, a diverse group of organisms consisting systematically of five classes including sea stars (Asteroidea), brittle stars (Ophiuroidea), sea urchins (Echinoidea), sea cucumbers (Holothuroidea), and feather stars (Crinoidea). It covers their life cycle, ecology, and general morphology.
David V.P. Conway +2 more
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