How many cells does the human body consist of and how quickly do they renew themselves? Detailed answer

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How many cells does the human body consist of and how quickly do they renew themselves? Detailed answer

Big encyclopedia for children and adults

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How many cells does the human body consist of and how quickly do they renew themselves?

The number of cells in the human body is about 100 trillion.

The shortest-lived (1-2 days) of them are intestinal epithelial cells. About 70 billion of these cells die every day. An example of other short-lived cells are erythrocytes - about 2 billion of them die every day. However, there are also such cells (for example, neurons, cells of skeletal muscle fibers), the life span of which corresponds to the life of the organism.

In all cells there is an intensive renewal of substances and structures.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

Why can fruits ripen on their own?

One of the phytohormones synthesized by plants, ethylene gas, contributes to the ripening of fruits, and it is formed even if the fruit has already been plucked from the branch. Therefore, fruits are harvested unripe before long-term transportation, and they ripen on their own on the road. And for a controlled process, fruits are placed in chambers where ethylene is forcibly supplied. Already ripe fruits release even more gas, which can be used to speed up the ripening of unripe fruits at home, simply by putting them in one bag.

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