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Related Concept Videos

Whole Body Regeneration01:33

Whole Body Regeneration

Regeneration is the process of restoring injured or lost tissues, organs, or body parts. While simpler organisms generally show greater ability to regenerate their whole body, few complex animals show similarly exceptional regeneration. For example, planarian flatworms have a unique regenerative potential making them a popular study organism among biologists to understand the mechanisms of whole body regeneration. Other organisms, such as hydra, also show extreme regeneration potential; even...
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The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
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Related Experiment Video

Updated: Jul 28, 2026

Facial Transplants in Xenopus laevis Embryos
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Published on: March 26, 2014

Epimorphic vs. tissue regeneration in Xenopus forelimbs.

R J Goss1, R Holt

  • 1Division of Biology and Medicine, Brown University, Providence, Rhode Island 02912.

The Journal of Experimental Zoology
|April 1, 1992
PubMed
Summary

Xenopus laevis froglets regenerate limb spikes through epimorphic regeneration. Removing skin prevented blastema formation, confirming this process is essential for limb regeneration in these amphibians.

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Inhibition of Wound Epidermis Formation via Full Skin Flap Surgery During Axolotl Limb Regeneration
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Published on: June 24, 2020

Area of Science:

  • Developmental Biology
  • Regenerative Medicine
  • Amphibian Biology

Background:

  • Postmetamorphic Xenopus laevis froglets exhibit limited limb regeneration, forming unbranched spikes.
  • The exact mechanism of this regeneration is debated: epimorphic regeneration from blastemas or tissue regeneration from fibroblastemas.

Purpose of the Study:

  • To determine whether Xenopus laevis limb regeneration is epimorphic or tissue regeneration.
  • To investigate the role of epidermal wound healing and blastema formation in Xenopus limb regeneration.

Main Methods:

  • Forelimbs of Xenopus laevis froglets were amputated proximal to the wrist.
  • Limbs were skinned and inserted into the abdominal cavity to prevent epidermal wound healing.
  • Regeneration was assessed after 2 months and compared to control limbs.

Main Results:

  • In the absence of skin, epidermal wound healing and blastema formation did not occur.
  • Denuded stumps failed to regenerate spikes, unlike control limbs which regenerated spikes averaging 3.38 mm.
  • Some denuded stumps formed cartilaginous caps or amorphous cartilage growths.

Conclusions:

  • Blastema formation is crucial for epimorphic regeneration in Xenopus laevis.
  • The findings support that Xenopus limb regeneration is an epimorphic process, not solely tissue regeneration.