Video: Leather In Numbers And Facts
2023 Author: Madeline Holiday | [email protected]. Last modified: 2023-11-27 01:48
The skin is the largest of all human organs. The surface of the skin is approximately 2 square meters. Its weight is 16% of the total mass of the human body. The mass of the skin of an adult is approximately 5.5 kg. Location: Location:
There are approximately 110 billion or 6 billion cells in one square centimeter of skin.
The number of sweat glands in one square centimeter is 100, and there are about 1,800,000 of them, and the sebaceous glands are only 250,000 and 15 in a square centimeter.
In total, the skin contains 240,000 cold receptors, 40,000 heat receptors, 60,500,000 receptors for touch, more than 1,000,000 painful endings and about 4,000,000 free nerve endings.
The thickness of the skin of a newborn is 0.4 mm, in an adult it is almost 2 millimeters.
The thickest skin is located on the palms of the hands and on the soles. There, its thickness can reach 9 millimeters.
The thickness of the skin on the eyelids is 1 mm. Here she is the thinnest. Almost 10% of all doctors' calls to children are caused by skin diseases. The skin of women who smoke is aging five times faster than that of nonsmokers!
Human skin cells are completely regenerated in an average of 28 days. About 450 milliliters of blood passes through the human skin per minute.
Human skin is almost three times stronger than dog skin.
American mountaineer and physician John West discovered blue-skinned people in the Chilean mountains. These were miners, whose skin turned blue due to the constant lack of oxygen at altitude.
The protective abilities of the skin are not unlimited. For example, over a lifetime, human skin is able to protect its owner from a fixed amount of sunlight. Their number ranges from 50 to 150 thousand hours of sunshine and depends on the type of skin. Therefore, it is so important to be very careful when sunbathing. Remember that too much sun exposure leads to faster and earlier aging of the skin, the appearance of wrinkles, and their ability to cause cancer has been proven.
But lack of sun also leads to trouble. In particular, rickets develops in those children who were deficient in vitamin D. And it is formed precisely in the skin under the influence of ultraviolet rays. It is responsible for the absorption of phosphorus and calcium by the body, which are necessary for bone growth.
Almost 200 species of bacteria are constantly present on human skin. Their total number reaches 500,000 billion. Most of them are useful and constitute the normal microflora of the body.
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