Slides: Hydra, l.s.

Hydra is a genus of small, freshwater organisms in the phylum Cnidaria (the same phylum as jellyfish and corals) and the class Hydrozoa. This organism reproduces asexually by budding and has a unique ability to regenerate a complete organism from a small segment cut off of the original organism. This longitudinal section shows the cell layers and gastrovascular cavity of the Hydra body.