| Individual polyps have eight feathery tentacles and, in the gastrovascular cavity, eight septa, or partitions. |
| To accomplish the bioassay, proliferating interstitial cells are labeled with BrdU by injecting BrdU into the gastrovascular cavity of the animal. |
| The archenteron becomes the gastrovascular system or coelenteron. |
| The mouth is prolonged by a short ½sophagus, the stomodeum, terminating in the gastrovascular cavity or c½lenteron, itself prolonged by a narrow canal to the end of each tentacle. |
| A second thin layer of cells, constituting the endoderm, lines the gastrovascular cavity. |
| Food and solid wastes enter and leave through a common opening in the well-developed digestive tract, which consists of a mouth, pharynx, and gastrovascular cavity. |
