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Document Type

Research

Abstract

One of the most interesting capacities of protozoans is their ability to replace lost parts following injury. Although they are structurally the equivalent of cells they are functional organisms, and a study of their behavior makes it possible to bring together concepts usually applied in the cellular field with those applied in the analysis of whole organisms. The same factors that operate to evoke a particular form in the whole organism must act in a small regenerating piece of a protozoan. Whether these factors are nuclear genes or protoplasmic organization, they act rapidly in the regenerating animal, regulating the form of the piece. Unlike the metazoan material, the morphogenetic activities are not a matter of differential growth rates, but are rather redistribution and reorganization of materials present in the regenerating piece. In this sense the repair of injury inprotozoans more closely resembles cellular differentiation than organogeny.

Publication Date

1956

Journal Title

Proceedings of the Iowa Academy of Science

Volume

63

Issue

1

First Page

634

Last Page

638

Copyright

© Copyright 1956 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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