How do we characterize the nine animal phyla in terms of the coelom?

Question:

How do we characterize the nine animal phyla in terms of the coelom?

Definition of Coelom:

The coelom is a cavity that arises in, and is lined by, the embryonic mesodermal epithelium; this cavity, which is found in animals and humans, is present between the alimentary canal and the body wall, or external surface, of the organism. It is filled with a fluid that is secreted by the peritoneum (serous membrane).

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We can characterize the nine phyla in terms of the coelom as follows.

There are three types of coelom:

1) Acoelomate - animals that lack coelom are...

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Animal Body Plans: Classifications and Features

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Chapter 22 / Lesson 1
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The body plans of animals have different classifications and features that are affected by various factors. Learn about body plans, the types of body symmetry, body cavities and tissues, and locations of body structures.


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