martes, 25 de enero de 2011






Regeneration:
Is the property of some living things have to redo some parts of their bodies. Some organisms replace or restore lost or amputated body parts.
By such regeneration whole organisms may dramatically replace substantial portions of themselves when they have been cut in two, or may grow organs or appendages that have been lost.
In a greater or lesser extent, nature has provided different organisms with the regenerative capacity, both in the field of botany and of zoology. Among the new methods to improve the characteristics and dissemination of plants we find the regeneration techniques of plants in vitro, including the organogenesis and the somatic embryogenesis that give the possibility to form the so-called “artificial seeds”. In zoology, it has been observed the regenerative capacity of some animals, such as planarians, hydras, starfish and crustacean. Many vertebrates have lost, at least in a significant way, the regenerative potentiality of most of their organs and tissues. However, some have retained a marked regenerative ability, among them, the Teleost, the Urodela (salamanders and tritons) and other types of amphibian. The Chelonian, crocodiles and snakes have lost in general the capacity to regenerate lost parts. Alligators have the possibility to regenerate their tails. Mammals have also limitations, since they cannot regenerate extremities, organs and tissues as some inferior animals do. There are exceptions, as those found in stags, dolphins and some type of mice as the MRL mice. The human being expresses only some physiological regenerative processes, or before some injuries that are mainly manifested in the epidermal cells of the oral mucosa and of the respiratory tract, the blood cells, the hair, the nails, the muscular tissue, the skin and the bone tissue. The new knowledge on the stem cell opens a new era that offers man the possibility to influence therapeutically on the regeneration of organs and tissues.



2) Reflections:
Questions:
a) Because maybe the Scientifics are going to give the live to this clones and when the original person in going to die the use the parts of the clone for the original people live and I think for that the humans don’t like do that.

b) Because maybe we are going to use the clones to slavery because if we had an accident and we amputate an arm we are going to use the clone to replace the arm and this is named slavery.

if you want to see a good video in youtube it is named plant reproduction: asexual reproduction is so good, sorry but i can't put the video.

by: laura mejia

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