Renewal is he process and result of renovating (make something go back to its original or previous state; change an old thing for a new one). Mobile, for its part, is what is linked to cells (the primordial constituent of living things).
It is known as cell renewal to capacity what does he have organism to achieve a Balance between cell division (which allows to produce new cells) and the death of these. This cell renewal is a dynamic process which involves the production of new cells that are identical to stem cells; meanwhile, other cells die.
There is a cell turnover rate for each kind of cell. In some cases, cell renewal is rapid and cells that die are “Replace” or i know “Recover” to great speed. In other cases, however, cell renewal is slow.
This means that, despite the fact that all of the organs It has cells that can be renewed, the rate of cell renewal varies in each case. In general, the greater the specialization of the organ, the lower the capacity for the renewal of its cells.
Cell renewal is not only linked to anatomy: Genetic heritage it is also important. On the other hand, habits are relevant in cell renewal since diet, physical activity and the consumption of substances such as alcohol or tobacco affect the process.
An example of cell renewal occurs in the skin when a person tans and then loses its acquired color. This is due to the fact that the skin cells are renewed over the days and, in this way, the tone that produced the action of the sun’s rays is gradually eliminated.
Our body is younger than us
According to a Swedish biologist named Jonas frisenNot all cells in the body are the same age, and the difference is truly considerable. Regardless of a person’s age, their body has many years less: between 7 and 10, to be more precise. This is because much of our fabrics they are in constant cell renewal.
Frisen is also the creator of a method that allows calculating the age of cells that aims to reveal more secrets, such as the reason that sooner or later cell renewal stops and, consequently, we die. On the other hand, this discovery indicates that some cells never renewThey remain in our body since we are born; it is the minority, and it is possible that all or almost all of those belonging to the cerebral cortex are found in this group.
To calculate the age of a human cell, there are several techniques They consist of labeling the DNA with some chemical component, although they are not as precise. Frisen proposed to observe the enrichment of carbon 14 that DNA experiences when the cell is born, although this cannot be practiced at the cellular level but with tissues, so that the penetration of this substance is greater and allows a more correct estimation of age.
According to one study, the rib muscles of people around the age of 40 showed an average age of 15.1. In the case of epithelial cells found in the surface of the intestine, cell renewal occurs every five days, while the rest of the intestine does not exceed 15.9 years of life.
Although there are experts who argue that the brain is not capable of generating new neurons when it completes the formation of its structure, a scientist named Elizabeth gould He questioned this certainty at the beginning of the 21st century, and all this shows us that cell renewal has several surprises for us, something that especially excites those who dream of fighting aging and, why not, death.