Regeneration (biology)
Regeneration (pronounced: /ˌrɛdʒɪˈneɪʃən/) is a process in biology where an organism regrows certain parts of its body that have been lost or damaged. This process is particularly common in plants and simple animals such as planarians and starfish, but is also observed in certain species of mammals and birds.
Etymology
The term "Regeneration" comes from the Latin regeneratio, meaning "a being born again". In the context of biology, it refers to the ability of an organism to regrow lost or damaged body parts.
Types of Regeneration
There are two main types of regeneration observed in the biological world: Morphallaxis and Epimorphosis.
- Morphallaxis (pronounced: /mɔːrfəˈlæksɪs/) is a type of regeneration where the remaining part of the organism reorganizes itself to form a complete organism. This is commonly observed in planarians.
- Epimorphosis (pronounced: /ˌɛpɪmɔːrˈfoʊsɪs/) is a type of regeneration where the lost or damaged body part is completely regrown from a group of undifferentiated cells known as a blastema.
Regeneration in Different Organisms
Different organisms have different capacities for regeneration. Some organisms, like starfish and planarians, can regenerate their entire body from a single piece. Others, like lizards and salamanders, can only regenerate certain parts, such as tails or limbs. In mammals and birds, regeneration is mostly limited to the liver and skin.
See Also
References
External links
- Medical encyclopedia article on Regeneration (biology)
- Wikipedia's article - Regeneration (biology)
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