Summary
The esophagus of Eisenia foetida is either everted or retracted after anterior wounding (first eight segments removed). When everted, it forms a temporary wound covering that is probably ultimately replaced by the migrating epidermis. The plug of coelomic cells which forms around the esophagus soon after wounding is composed mainly of free coelomic cells (amoebocytes and eleocytes), with a predominance of the phagocytic amoebocytes. The fixed coelomic cells (parietal peritoneum and visceral peritoneum (chlorogogue)) make little contribution. There is little evidence for body wall muscle dedifferentiation within four days of injury, though some degradation of muscle fibers occurs. In shallow surface wounds that do not pierce the coelom epidermal basal cells and one class of cells found between the body wall muscle fibers form a plug similar to that formed by amoebocytes after anterior wounding. Structural and functional similarities indicate a relationship among these three cell types (epidermal basal cells, coelomic amoebocytes, one class of cells of the body wall), though they are normally found in different locations within the animal.
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I thank Dr. H. E. Potswald for his guidance and for his criticisms of the manuscript. This study is part of a thesis submitted to the University of Massachusetts in partial fulfillment of the requirements for the degree of doctor of philosophy. It was supported by a National Defense Education Act Title IV Graduate Fellowship and by Grant GB 18429 awarded to Dr. H. E. Potswald by the National Science Foundation.
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Burke, J.M. Wound healing in Eisenia foetida (Oligochaeta). Cell Tissue Res. 154, 83–102 (1974). https://doi.org/10.1007/BF00221073
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DOI: https://doi.org/10.1007/BF00221073