Mammals - regeneration in vertebrates, Biology

Mammals - Regeneration in Vertebrates

Mammals are not capable of regenerating limb or tails. However, there are a few exceptions where lost tissues are regenerated. The annual replacement of antlers in dm is ones such instance. The old antlers are shed, and new ones grow to replace them. It has been observed that in the infant opossums (marsupial) that are rather incompletely differentiated at birth, amputated hind limbs possess extensive ability for regeneration. A cut hind limb regenerates while stimulated by implantation of a fragment of brain into it. Generally, however, regenerative capability in mammals is limited only to tissue regeneration, such as wound healing, repair of bone fractures and damaged muscles. Mammals possess extensive power to regenerate liver later than more than 75% of it is removed. However, the lost part of the liver are not restored. The residual part of liver increases in size through cell division to restore the original size of the organ. This is an example of compensatory hypertrophy.

So far there is no proof to show that major limb parts in mammals regenerate, though amputation by the terminal phalanges of hands in human children can be followed by whole regeneration of the finger tip. The full length of the finger may be restored and the nail and finger print whoole appear normal. There is normally no loss of mobility or sensation. Regeneration in these instances however occurs only in nonexistence of surgical intervention. Some researchers have pointed out electrical currents as being helpful in regenerating finger tips in humans.

Posted Date: 1/31/2013 6:39:17 AM | Location : United States







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

Write discussion on Mammals - regeneration in vertebrates
Your posts are moderated
Related Questions
Water soluble Vitamin A  Water soluble vitamin A is a yellowish green, slightly turbid, fluorescent liquid of faint characteristic odour. The taste is at first faintly sweet an

Q. What is Revisions? Revision accounts for only a section of a genus or for the elements as restricted to a continent or smaller geographical area. Some revisions are based so

DISORDER S OF MALE REPRODUCTIVE SYSTEM (i) Prostatomegaly - Enlargment of prostate gland. It causes difficult & painful micturition. (ii) Impotence - Inability of male

Define the elements that affects the Fitness? Fitness varies from a person to person. It is influenced by age, sex, heredity, personal habits, exercise and eating practices. Th

State two ways in which cardiac muscle is microscopically similar to skeleton muscle.

Dissolved Gases and Alkalinity Dissolved Gases The marine environment serves as a gigantic reservoir of dissolved oxygen and carbon dioxide, which respectively help reg

Diarrhoea   Diarrhoea refers to frequent passage of loose watery stools. Acute diarrhoea often called as acute gastroenteritis  is particularly a leading cause of mortality in

Agro-industrial byproducts Agro-industrial by-products in Southeast Asia are available in plenty, due to the emphasis on crop cultivation. By-products of agro-industries repre

ADA PTATIONS IN SKELETON FOR UPRIGHT POSTURE - 1.      Foramen magnum is directed downward so that the head may rest vertically on the vertebral column. 2.      Four curves

Determine the term - Leuconoid sponge. The most complex of the three different sponge architectures. Choanocytes are found in chambers, and there is not any spongocoel. Water e