Regeneration and its examples, Biology

Assignment Help:

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.


Related Discussions:- Regeneration and its examples

Define future challenges for dynamical network, Define Future challenges fo...

Define Future challenges for dynamical network? Graph theory is an old field of mathematics where biological applications are driving new advances. Mathematicians are supplemen

Define commodity topics of food science, Define Commodity Topics of Food Sc...

Define Commodity Topics of Food Science? All issues of food science and technology of certain commodity groups, including milk and milk products (fluid milk and derivatives, ic

Ecological adaptation in animals to aquatic environment, Ecological adaptat...

Ecological adaptation in animals to aquatic environment In the aquatic environment animals are confronted with the problem of excess water. Freshwater and marine animals try to

Define the marasmic kwashiorkor, Define the Marasmic Kwashiorkor? In co...

Define the Marasmic Kwashiorkor? In countries where the incidence of protein-calorie malnutrition (PCM) is high, a large number of cases show signs and symptoms of marasmus and

Competence of larval tissue or multiple responses, Competence of Larval Tis...

Competence of Larval Tissue or Multiple Responses The responsiveness of different larval tissues to thyroxine is markedly different. The tissues of the tail becomes necrotic

What is kingdom monera, What is Kingdom Monera? The eubacteria, archaeb...

What is Kingdom Monera? The eubacteria, archaebacteria, and blue-green bacteria (or cyanobacteria) which form Kingdom Monera lack the cellular organization that all other livin

Determine the binocular movements, Determine the Binocular movements Bi...

Determine the Binocular movements Binocular movements are those when the relative movements of both eyes are studied together in the directions, e.g., right or left. There are

Proteins requirements for ulcerative colitis, Q. Proteins requirements for ...

Q. Proteins requirements for ulcerative colitis? Proteins: Patients with ulcerative colitis lose about 4-8 g fecal N2 as compared to the normal excretion of 2 g. In severe ulce

Tropical rain forests - ecosystem, Tropical rain forests - Ecosystem T...

Tropical rain forests - Ecosystem Tropical rain forests occur near the equator. Tropical rain forests are among the most diverse communities on the earth. Both temperature and

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd