An analysis of hydrozoan gastrulation by unipolar ingression.

  title={An analysis of hydrozoan gastrulation by unipolar ingression.},
  author={Christine A. Byrum},
  journal={Developmental biology},
  volume={240 2},
Unipolar ingression is a common form of gastrulation in the phylum Cnidaria. Here, this process is examined in the hydrozoan Phialidium. Ultrastructural investigation confirmed that, during this process, oral cells elongate, constricting at their apical ends and/or expanding at their basal ends as they ingress. Marking studies show that most entodermal cells originate from the oral area, but a few also come from lateral, aboral-lateral, and aboral areas. Based on orientation of mitotic spindles… CONTINUE READING

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