The basic body plan consists of a central digestive compartment known as the gastrovascular cavity that serves as both mouth and anus.
The absence of mesoderm has limited animals of this phylum to relatively simple body construction. The basic body plan consists of a central digestive compartment known as the gastrovascular cavity that serves as both mouth and anus. Usually, animals from this phylum exist as cylindrical forms that adhere to a substratum, called polyps, or flattened versions of polyps known as medusae. They are probably most recognizable by their stinging capsules known as nematocysts. FTP, identify this phylum that contains the hydras, sea anemones, and jellyfishes.
The absence of mesoderm has limited animals of this phylum to relatively simple body construction.
{Cnidaria}