| The mouth opens into a cavity, the coelenteron, or gastrovascular cavity, which is digestive and circulatory at the same time. |
| This opens into the gastrovascular cavity, where digestion takes place and nutrients are absorbed. |
| 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. |
| Thus the disposition of the endoderm-cavities is roughly comparable to the gastrovascular system of a medusa. |
| Individual polyps have eight feathery tentacles and, in the gastrovascular cavity, eight septa, or partitions. |
| 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. |
