Encyclopedia Americana, Volume 8Americana Corporation, 1965 - Encyclopedias and dictionaries |
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Page 260
... body . Primitively each body segment bore a pair of appendages that were alike throughout the body length but at present appendages are often lacking from some body regions and present a great variety of form and function in different ...
... body . Primitively each body segment bore a pair of appendages that were alike throughout the body length but at present appendages are often lacking from some body regions and present a great variety of form and function in different ...
Page 261
... body ; it is em- ployed in courtship and fighting . These asym- metries are not linked to a particular side of the body , and the condition in a given individual can be reversed through regeneration experiments . Muscular and Nervous ...
... body ; it is em- ployed in courtship and fighting . These asym- metries are not linked to a particular side of the body , and the condition in a given individual can be reversed through regeneration experiments . Muscular and Nervous ...
Page 262
... body spaces from which it slowly returns to the heart . The heart , situ- ated in the middorsal region , is often quite elongated and may show segmental structure ; its wall is perforated by openings or ostia often segmentally arranged ...
... body spaces from which it slowly returns to the heart . The heart , situ- ated in the middorsal region , is often quite elongated and may show segmental structure ; its wall is perforated by openings or ostia often segmentally arranged ...
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