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
Population You must be familiar with the term 'population'. It is one of the most talked about issues of this century. It is feared that the rapid growth of the world population

How did muir's impression of man's relationship with nature differ from Susan Fenimore coopers? And How did Gifford Pinchot view nature?

What is phototropism? Phototropism is the movement of plant structures in response to light. Phototropism might be positive or negative. Positive phototropism is that in which

A typical chest x-ray exposes the patient to a radiation dose of 0.01 rem. If a man receives 10 such x-rays in a lifetime, what is his chance of developing cancer as a result of th


Q. Managing diarrhoea in children? Managing diarrhoea in children is of great concern. The guidelines for the same are as follows: 1. The first objective is to rehydrate the

An increase in the calcium conductance of all sarcoplasmic reticulum membranes of a skeletal muscle with no external forces on it leads to A. increased binding of calcium ions

What does vacuoles do? It is an organelle, located in the cell's cytoplasm, which is the site of protein synthesis. It is really a protein having of 2 parts. These 2 "parts"

Q What is the system that permits fixation and movement to echinoderms? The system that permits fixation and movement to substrates in echinoderms is called the ambulacral syst

Nonsurgical retreatment will be the preferred choice -Less invasive .. not cause problem to the pt. -Less traumatic postoperative .. most probably no post operative pain