BODY CAVITIES During embryonic development of triploblastic animals, the development of the three embryonic layers can occur differently, leading to animals that are acoelomate, pseudocoelomate, or coelomate. Acoelomate animals, such as flatworms, lack a body cavity, scientifically referred to as a coelom. Pseudocoelomate animals, such as round worms, have a fluid-filled body cavity separating the gut from the body wall, but only the body wall is lined with mesoderm. In coelomate animals, adults have a body cavity where the organs are suspended by mesentery membranes, and both the organs and the body cavity are completely lined with mesoderm. These types of body cavities are illustrated in Figure 4.2.
BODY CAVITIES During embryonic development of triploblastic animals, the development of the three embryonic layers can occur differently, leading to animals that are acoelomate, pseudocoelomate, or coelomate. Acoelomate animals, such as flatworms, lack a body cavity, scientifically referred to as a coelom. Pseudocoelomate animals, such as round worms, have a fluid-filled body cavity separating the gut from the body wall, but only the body wall is lined with mesoderm. In coelomate animals, adults have a body cavity where the organs are suspended by mesentery membranes, and both the organs and the body cavity are completely lined with mesoderm. These types of body cavities are illustrated in Figure 4.2.
Biology 2e
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ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark
Chapter27: Introduction To Animal Diversity
Section: Chapter Questions
Problem 2VCQ: Figure 27.6 Which of the following statements is false? Eumetazoans have specialized tissues and...
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In your own words, describe information from Figure 4.2. Give examples of different organisms covered in lab that fall into each category (you can exclude deuterostomes, since we cover that in the next lab).
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NOTE:- "As you haven't mentioned the examples of organisms that are covered in your lab so we will provide examples on our own for each coelom".
The main body cavity is the coelom in the animals that lies between the outer body wall and the gut.
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