Regeneration and its examples, Biology

REGENERATION -

Natural ability of living being to replace worn out parts, to repair damaged parts, to regrow cost off organs & to reform entire body from a small piece. Power of regeneration was first discovered in Hydra by trembley.

EXAMPLES -

1.       In amoeba each piece can form new amoeba if a part of nucleus present.

2.       In sponges cells are loose, can form complete animal, described by H.V. Wilson.

3.       In hydra a piece can form new animal if epidermis & dermis both layers present having interstitial cell which is totipotent in nature. Regeneration of a part of an organism by growth at the cut surface is known as epimorphosis.

4.       In planaria compelte animals is developed from small fragment rate is high at head present and progressively decreases towards the tail end. This variation is called axial gradient.

5.       In earthworm anterior end can regenerate posterior end.

6.       Insects, crabs, lobester & spider can regenerate a lost leg. Cray fish can regenerate eyes too. Prawn breaks off the injured appendage i.e. autotomy.

7.       Cephalopods can rejenrate arms.

8.       In starfish tube feet is regenerated by autotomy.

9.       Ammocoet larva of lamprey can regenerate lost tail.

10.     Salamender, newt, axolotal larva can regenerate leg, tail, jaws, external gills, intestine and ratina.

11.     Some lizards can regenerate the lost tail. The regenerated tail differs from the original one in shape, eg. absence of vertebrae and kinds of scales covered.

12.     Certain birds can regenerate beak, feathers etc.

13.     In mammals, in liver power of regeneration is maximum.

If one kidney is lost, the other compensate it. It is compensatory hypertrophy.

Posted Date: 10/4/2012 5:51:30 AM | Location : United States







Related Discussions:- Regeneration and its examples, Assignment Help, Ask Question on Regeneration and its examples, Get Answer, Expert's Help, Regeneration and its examples Discussions

Write discussion on Regeneration and its examples
Your posts are moderated
Related Questions
THEOR Y OF EPIGENESIS - It was propounded by C. F. Wolff and supported by Von Baer. According to it, the egg contains the substances which are required in the formation

Risk during crown removal -Tooth inadvertently extracted using a crown\bridge remover . -Endodontic therapy was performed , and the tooth was replanted , a procedure known

In a properly functioning negative feedback system, the A. value of the controlled variable will always be very close to the threshold value when the system is in steady state.

A charged particle A exerts a force of 2.39uN to the right on charged particle B when the particles are 12.3 mm apart. Particle B moves straight away from A to make the distance be

Integral plasma membrane proteins are also synthesized by ribosomes on the RER, but become inserted in the rough endoplasmic reticulum membrane rather than transported into the lum

Residual Volume - Respiration Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

PGA as the first CO2 fixation product was discovered in photosynthesis of: 1. Bryophyte 2. Gymnosperm 3. Angiosperm 4. Alga Alga

Phenology of Different Species The phenology of different species present in a community may differ from each other significantly. It is these phenological changes which give

Assume that the smallest object your visual system can detect is 100 micrometers in size and you have a microscope with a 10x ocular lens. If you have an object that is 1 nanometer

Q. List disbeliefs which patients have about insulin? a) Insulin is not effective. Some patients believe that insulin is not effective for treating diabetes. b) Insulin c