Loose Leaf For Integrated Principles Of Zoology
18th Edition
ISBN: 9781260411140
Author: Cleveland P Hickman Jr. Emeritus, Susan L. Keen, David J Eisenhour Professor PhD, Allan Larson, Helen I'Anson Associate Professor of Biology
Publisher: McGraw-Hill Education
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Chapter 18, Problem 15RQ
Summary Introduction
To describe: The way in which a hemocoel is found to be different from a true coelom.
Introduction: Panarthropoda is the clade of ecdysozoans that combine the extant phyla Arthropoda and two allied phyla Tardigrada and Onychophora. In these taxa, the coelom is reduced and develops into hemocoel.
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How is a hemocoel different from a true coelom?
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Loose Leaf For Integrated Principles Of Zoology
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- What was the evolutionary significance of segmentation and the coelom to its earliest lophotrochozoan possessors?arrow_forwardIn what annelid groups are septa between coelomic compartments lost? Whatadvantages does this loss give each group?arrow_forwardDraw a simple diagram (cross section) to distinguish between a coelomate and either a pseudocoelomate or an acoelomate. In a few words point out the key difference.arrow_forward
- Coelomates have an enclosed coelom completely lined with mesodermally derived tissue. Accelomates have an enclosed coelom partially lined with mesodermally derived tissue. Pseudocoelomates have no enclosed coelom. true or falsearrow_forwardDescribe the differences in the coelomic systems between Oligochaetes and Polychaetes. How do the differences in the coeloms relate to differences in locomotion? Which characteristics unify the lophophorates? Describe each characteristic and how it differs between the lophophorate phyla.arrow_forwardWhat are coelomocyte, identify their location and enumerate their functions?arrow_forward
- What is the point of dividing the coelom into the thoracic and abdominal cavities? Why would a single cavity not function as well?arrow_forwardWhat are some adaptive advantages of a pseudocoel compared to the acoelomate condition?arrow_forwardConsider the process of organogenesis. a) Describe how coelom-status impacts the process of organogenesis. b) How do organs develop and where (in which cavity)? When does this process occur?arrow_forward
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