The human body is a complex living machine, which cohesively as a single unit, operate the different systems.
All parts of the body are composed of cells, which in the body of an adult is about 100 trillion. Some of these cells are constantly dying, and their places are taken by new ones. For the different organs and tissues of the human body, the complete cycle takes different amount of time. And for many cells in our body this term is defined more or less accurately, reports Rus.Media.
And even if the passport your age is, for example, age 35, your skin may be from birth just two weeks, the skeleton 10, and the lens of your eye around your peers.
Complete replacement of epithelial cells occurs in 14 days. Skin cells are formed in the deeper layers of the dermis, gradually come to the surface and replace the old cells die and are sloughed off. One year our body produces about two billion new skin cells.
Cells of muscle
Skeletal muscle tissue is fully updated with a frequency of 15-16 years. The rate of cell renewal is affected by a person’s age – the older we get, the slower the process.
7-10 years is the time during which there is a complete cellular renewal of bone tissue. In the structure of the skeleton simultaneously operate both old and young cells. The wrong unbalanced diet may affect for the worse the quality of new cells, causing numerous complications. Bone tissue daily produces hundreds of millions of new cells.
A full update of red blood cells is 120 to 150 days. The body of a healthy person daily produces the same amount of red blood cells, how many of them are killed, and this number is about 500 billion cells, which have different purposes.
Epithelial cells of the stomach that filter nutrients inside the body are replaced very quickly in just 3-5 days. This is necessary since these cells are exposed to extremely aggressive environment of gastric juice and enzymes responsible for the processing of food.
If you do not focus on the cells of the intestinal epithelium that is replaced every 5 days, the average age of the intestines will be approximately 15-16 years.
Its cells are completely renewed in just 300-500 days. It is strange that with the loss of 75% of the cells of the liver, it can regenerate its full volume in just 3-4 months. Therefore, a healthy person can does not worry for your health to transplant part of his liver to someone in need – it will once again grow.
For a long time it was believed that the cells of the myocardium (heart muscle) does not get updated. However, recent studies have shown that full recovery of the heart muscle occurs approximately every 20 years.
The lens and the brain cells responsible for processing visual information are of the same age as the man. Regenerated and updated only the cells of the cornea. While a complete upgrade of the cornea occurs quite quickly – the whole cycle takes 7-10 days.
The hippocampus area of the brain responsible for learning and memory, and olfactory bulb regularly update their cells. Moreover, the higher physical and brain activity, the more often the formation of new neurons in these regions.