Summary
Planarians, starfish and salamanders regrow lost parts using stem cells or dedifferentiation.
In depth
Planarians regenerate from small fragments using neoblast stem cells; salamanders regrow limbs via blastema formation; zebrafish repair hearts. Mammals show limited regeneration, such as in liver and fingertip.
Regeneration may involve stem cells or dedifferentiation. Control of growth stops overgrowth. Understanding it may help therapy.
Example: lizards regrow tails but with cartilage.
Frequently asked questions
What is Regeneration?
Planarians, starfish and salamanders regrow lost parts using stem cells or dedifferentiation.
Which area of biology covers Regeneration, and how advanced is it?
Regeneration is one of the 53 topics in Zoology & Animal Diversity. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Island Gigantism and Dwarfism, Flatworms, Animal Cognition.
Can you give an example of Regeneration?
Starfish can grow a new body from an arm in some species.
What should I learn before Regeneration?
Work through the Beginner topics in Zoology & Animal Diversity first, such as Animal Kingdom, Vertebrates and Invertebrates, Sponges, then return to Regeneration. Advanced topics assume the Intermediate vocabulary.
What topics are related to Regeneration?
The closest topics to Regeneration are Island Gigantism and Dwarfism, Flatworms, Animal Cognition, Animal Skeletons. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Regeneration?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Regeneration. To practise the whole of Zoology & Animal Diversity, use the Zoology & Animal Diversity quiz.
How is Regeneration different from Island Gigantism and Dwarfism?
Regeneration: Planarians, starfish and salamanders regrow lost parts using stem cells or dedifferentiation. Island Gigantism and Dwarfism: Isolated animals tend to evolve larger or smaller sizes depending on resources and predators. Read both side by side and note what each one explains.
How should I study Regeneration step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Island Gigantism and Dwarfism and explain the difference aloud. Finally, take the Zoology & Animal Diversity quiz and come back to this page for any question you miss.