The following points highlight the five main parts that make up the internal structure of Hydra. The parts are: 1. Body Wall 2. Epidermis 3. Gastrodermis 4. Mesogloea 5. Gastro vascular cavity. 1. Body Wall: The body wall consists of two cellular layers, an outer epidermis derived from ectoderm and an inner gastro dermis derived […]
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