Hydra - Ward's Science. Their saclike body is made of two layers of cells. They have radial symmetry, with tentacles surrounding the single opening of the gastrovascular cavity. Stinging cells are present on the tentacles. The body may be gray, brown, white, or green. HYDRA? - Textron SystemsMethod of reproduction: Hydra usually reproduce asexually, by budding. Hydra can also reproduce sexually, but this is much less common. Differentiation must be ... Hydra - Universal Scene DescriptionHydra are freshwater coelenterates found throughout the world. They range in size from less than 1 mm to 5 mm. Their simple structure consists of a polyp ... The Hydra SystemHydra is a member of the animal phylum Cnidaria. This phylum includes corals, sea anemones and jellyfish. While most cnidarians are marine, Hydra is unusual in ... HYDRA SYSTEM - L3Harrisstimulus by contracting first and then orienting; and Rushforth, Burnett and. Maynard ('63) studied the contraction re- sponse in Hydra pirardi, the large ...
