Difference Between Fragmentation and Regeneration

Reproduction methods can be categorized into two types that existing among all organisms living on this earth, namely asexual reproduction and sexual reproduction. The method of asexual reproduction does not involve the exchange of genetic materials, while sexual reproduction involves the exchange of genetic material. In asexual reproduction, the process of exchange of genetic material does not occur. The probability of variations occurring is very low in this reproduction. Hence, asexual reproduction is most advantageous if the organisms are well adapted to a constant environment without significant changes. In animals, generally asexual reproduction is limited to invertebrate forms. Both fragmentation and regeneration come under occur in the asexual reproduction method. The major difference between fragmentation and regeneration is that fragmentation is a process in asexual beings as a form of reproduction, in which fragment a portion of his body and this becomes a new organism. On the other hand, regeneration is a process of restitution of an organism (or part thereof) but does not create new life. In this article, you will read and understand the basic concepts of fragmentation and regeneration in detail through several examples.

Difference Between Fragmentation and Regeneration in Tabular Form




An organism splits into fragments and each of these fragments develops into individual organisms. Regeneration is a process if an organism only regrows a lost limb or any other part of the body.
All fragment forms into a new organism. There are no new organisms formed during regeneration.
The process is only seen in organisms that have the same simple body organization and are multi-cellular. The Process is seen in multi-cellular organisms that have complex body organization.
Limited to certain organisms. Seen in all organisms either up to a certain extent or completely.
Does not involve the use of specialized cells. Involves the use of specialized cells in proliferating and forming a cell cluster
Only seen in invertebrates that occur in multicellular organisms. Seen in vertebrates and invertebrates.
Generally seen in plants, especially non-vascular ones. Generally seen in animals as compared to plants.
New individual emerges No new organisms are formed
Examples: Fragmentation occurs in algae, flatworms, sponges, etc Examples: Regeneration occurs in starfish, mammals, etc.

Fragmentation Vs. Regeneration – Overview

Fragmentation and regeneration are two major kinds of growth that occur in organisms. Therefore, fragmentation is a method of asexual reproduction, while regeneration is not a method of reproduction. The major difference between fragmentation and regeneration is that fragmentation is a process of breaking of a parent organism into several parts, each of which becomes a new organism. On the other hand, regeneration is the process of regrowth of a broken part of an organism. However, this is the basic difference between these two terms. Let us discuss fragmentation and regeneration in detail through comparison and several examples.

What is fragmentation?

It is the method of asexual reproduction that occurs in multicellular organisms. Fragmentation involves animals like sponges, annelids, and flatworms. This process also occurs in plants, molds, lichens, filamentous bacteria. In colonial organisms, the process of fragmentation is called colonial fragmentation. It serves as a method of vegetative reproduction in higher plants. Bulbils, Rhizomes, stolons, and adventitious plants serve as fragments that can grow into new plants. The resultant genes are exactly the same as the parental organism. In lower plants such as spirogyra, which are the green filamentous algae in ponds, they can be mechanically broken down into several parts and each part can become a new organism.

What are two methods of fragmentation?

The two main fragmentation methods are Paratomy and Architomy.

  • The regeneration of missing organs and tissues occurs from the point of fragmentation is called Architomy.
  • the fragmentation of the organism that occurs perpendicular to the anteroposterior axis is called Paratomy.

What is regeneration?

It is the process of reactivation of development to restore missing tissues. Regeneration through several methods, i.e. epimorphosis, Morphalaxis, and compensatory regeneration. The undifferentiated mass of cells is formed by the de-differentiation of an adult structure, which then becomes the missing tissue is called Epimorphosis. While the re-patternation of existing tissue is responsible for the development of the missing part is called Morphalaxis. In Morphalaxis, only a small portion can be regenerated. hydra is the most common example. The regeneration of blastema occurs through pattern formation. On the other hand, The cell division to regenerate missing tissue, and the cells remain in their differentiated nature is called compensatory regeneration.

Similarities Between Fragmentation and Regeneration

  • Both are two methods used by organisms to grow their body.
  • Fragmentation and Regeneration occur in multicellular organisms.
  • Both occur when an organism breaks into parts.
  • Both methods undergo mitotic cell divisions.
  • There are two main methods of fragmentation are Paratomy and Achitomy, whereas, the three main methods of regeneration are epimorphosis, Morphalaxis, and compensatory regeneration.
  • Fragmentation occurs in organisms with a lower organization.
  • regeneration occurs in organisms with a higher organization.

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