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31 Dec 2021
Background and context
Cnidarians have a body wall made up of two tissue layers and are radially symmetrical. They have two body layers, an exterior epidermis and an interior gastrodermis, and are the simplest creatures. Mesoglea is a non-cellular gelatinous material that lies between these layers. Despite the fact that this group has only a few organ systems, diffusion is responsible for the majority of their life processes.
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