| A | B |
| cnidarian | member of a group of invertebrates with radial symmetry and tentacles with stinging cells |
| radial symmetry | body plan in which an organism can be divided into equal parts around a central axis |
| cnidocyte | specialized cell in cnidarians that functions in defense and capturing prey |
| nematocyst | stinging capsule found in a cnidocyte |
| gastrovascular cavity | digestive sac |
| polyp | cnidarian body form consisting of a clindrical body with tentacles radiating from one end |
| medusa | cnidarian body form that is umbrella-shaped with fringes of tentacles |