What happens when Planaria is cut into pieces?
BiologyClass 10CBSEAnswered 28 May 2026
Answer
When Planaria (a flatworm) is cut into pieces, each piece regenerates into a complete new organism. This is called regeneration.
- Planaria has totipotent stem cells called neoblasts that can differentiate into any cell type.
- Even 1/300th of the body can regenerate a whole worm.
- Also used as a natural form of asexual reproduction through fragmentation.
- Makes Planaria a key model organism for stem cell research.
Summary: When cut, each piece of Planaria regenerates into a complete new organism through totipotent stem cells true regeneration.
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