Morphallaxis - regeneration, Biology

Morphallaxis - Regeneration

This kind of regeneration takes place in plants, sponges and coelenterates such as jelly fishes and hydra. The missing parts are replaced via reorganization or re-modelling of the pre-existing ones. The wound is healed and the re-neighboring tissues re-organize themselves into whatever parts might have been lost or removed. So in this type of regeneration the residual part of the animal is able of restoring the lost part or giving rise to the whole organism just by remodelling or reorganising the entire available mass of cells into a new whole. The process does not include growth until the lost part or the whole body is regenerated, which is necessarily small at first.

Growth to reach normal size occurs later. Morphallactic regeneration can occur in total absence of cell division, as is seen in the case of regeneration in Hydra. A part of Hydra as small as l/200th of the original individual can make a complete animal without cell proliferation being involved. Thus even a few cells are able of forming a new organism; similarly in sponges a few archaeocytes are capable of regenerating a whole sponge body. The morphallactic procedure of regeneration is observed only in lower groups of animals. Animals with much more complex organisation regenerate their parts differently, generally by the production of a specialized bud or blastema.

Posted Date: 1/31/2013 4:18:45 AM | Location : United States

Related Discussions:- Morphallaxis - regeneration, Assignment Help, Ask Question on Morphallaxis - regeneration, Get Answer, Expert's Help, Morphallaxis - regeneration Discussions

Write discussion on Morphallaxis - regeneration
Your posts are moderated
Related Questions
Chromosomes Karl Nageli and Hofmeister observed chromosomes in pollen mother cells of Tradescantia. Chromosome name proposed by Waldeyer. During cell division,

Define role of Leptin in controlling gene expression? Leptin is a protein product (containing 167 amino acids) of the ob gene expressed exclusively in the adipose tissue. This

Q. Corelation of ST Depressoin with Coronary Angiography? Various investigators considered 1 mm of horizontal or downsloping ST depression to denote a positive test and used fr

Q. What is the group of the phylum Chordata that first colonized the terrestrial environment? From which habitat did they come? Partially aquatic partially terrestrial animals,

Ecosystem diversity measures based on the species composition of flora, or fauna, or other ecosystem properties, are all equally justifiable: but measures based on different crite

What are the types of brain?

Explain the main  function of the digestive system The major function of the digestive system is to ingest the food materials, digest it to absorbable end products, absorb the

Define Observation or Inference for half and full saturation Test? 1. Starch is precipitated by half saturation with ammonium sulfate whereas dextrin is not precipitated. This

Define about the Simple proteins? Simple proteins are those which contain only amino acids or their derivatives and no prosthetic group. They yield only amino acids or their de

Tricuspid Stenosis :  Acquired tricuspid stenosis is most often due to chronic rheumatic carditis. Rarely could it be due to right atrial tumors or carcinoid syndrome producing mi