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

NUMBER Benden and Boveri first indicated that number of Chromosomes is definite in each organism. (1) Haploid (n) - One set of Chromosomes. i.e. one Chromosome of each

Which are the structures that are part of the nervous system? The structures that form the nervous system can be separated into the central nervous system (CNS) and the periphe

The pentose phosphate pathway also called as the phosphogluconate pathway and the hexose monophosphate shunt is a procedure which gives pentoses 5-carbon sugars and NADPH. There ar

Q. What is the endocrine function of the placenta? The placenta is not a permanent gland of the endocrine system other than this it also has endocrinal function. The placenta p

Name two possible why the number of live bacteria cell have reached the stationary growth by 60hrs and start to die off after 12hrs?

Q What is the difference between catabolism and anabolism? Metabolism comprises two opposing processes: catabolism and anabolism. Anabolism is a set of synthesis reactions that

Anti Lipid Drugs :  The current thinking is that it is very important to keep lipid levels low. It helps in preventing atherosclerotic changes in venous grafts and the long-term p

Considering a pair of homologous chromosomes containing a gene having two different alleles how many different genotypes can the individual present? If a gene of the diploid sp

Assume you are injecting a sub threshold depolarizing current step into a neuron. Draw the corresponding membrane voltage response; be sure to indicate the shape of the voltage cha