BRAINCAKERegeneration
Regeneration is the regrowth of lost or damaged body parts by mitosis followed by cell differentiation. In some organisms it is powerful enough to act as a form of asexual reproduction: if the body is broken into pieces (fragmentation), each piece can regrow the missing parts and become a complete new individual.
Examples:
• Flatworms (planarians): a planarian cut into several pieces can produce several complete worms, because its body contains many undifferentiated stem cells that divide and differentiate into any tissue needed.
• Starfish: a single arm that includes part of the central disc can regrow into a whole starfish.
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Key terms in this lesson
- stem cell
- An undifferentiated cell that can divide by mitosis and differentiate into one or more specialised cell types.
More in The Cell Cycle
- Telophase
- Cytokinesis
- Asexual Reproduction
- Sporulation
- Budding
- Vegetative Propagation
- Mitosis and Growth and Repair
- Measuring Growth
All 18 lessons in The Cell Cycle · All Edexcel AS-level Biology topics