Hydra and Hydroid Polyps
Since the times of A. Trembley (first half of the 18th Century) (see ) freshwater hydra have been used in laboratories as a suitable species for studying the mechanisms of regeneration and asexual reproduction (for a review of earlier papers, see ). Since the middle of the 20th Century there have been many detailed investigations on the mechanisms of cell differentiation and the control of morphogenesis. It is impossible to review so much work in his short chapter (for references see ). Investigations make use of the adult, intact, regenerating, and budding hydra as well as mutant strains, their chimaeras, and cell cultures.
KeywordsSexual Reproduction Germinal Vesicle Nile Blue Proximal Zone Ovarian Nurse Cell
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