Sentence Examples


  • Thus the disposition of the endoderm-cavities is roughly comparable to the gastrovascular system of a medusa.
  • (2) The body contains but a single internal cavity, the coelenteron or gastrovascular space, which may be greatly ramified, but is not shut off into cavities distinct from the central digestive space.
  • The archenteron becomes the gastrovascular system or coelenteron.
  • The ectoderm covers the whole external surface of the animal, while the endoderm lines the coelenteron or gastrovascular space; the two layers meet each other, and become continuous, at the edge of the mouth.
  • As a general rule the mouth is the only aperture of the gastrovascular system; in a few cases, however, excretory pores are found on the ring-canal, but there is never any anal opening.
 

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