The skin consists of three layers, epidermis, dermis, and fatty tissue.
The dermis contains 70% collagen, which decreases by 1% every year.
In the skin, there are 150 nerve endings, whiter than 3 million cells, from 100 to 300 sweat glands, 1 km of blood vessels.
The sweat glands on the skin act as regulators of body temperature. Most of the sweat glands are found on the feet, palms and forehead.
Africans and Europeans have more sweat glands than Asians.
During the entire life of a person, the skin is renewed approximately 1000 times.
The total weight of the skin shed during a person's life is about 18 kg.
Complete renewal of skin cells in an adult varies from 26 to 30 days, and in newborns, it is renewed in 72 hours.
Human skin produces antibacterial chemicals to keep germs from growing. In addition to acting as a physical barrier to infections, the skin also produces antibacterial peptides that function to protect the skin itself from infections.
The sebaceous glands secrete 20 grams per day. sebum, then sebum is mixed with sweat, creating a protective film.
The skin is the largest organ. In a person with an average build, it covers 2 sq. M.
One square centimeter of skin contains 30 million different bacteria.
The skin produces more than one liter of sweat in one day.
The vascular system of the skin contains about 1.5 liters of blood, that is, 1/3 of the total blood volume in the body.
The thickest skin is on the feet, up to 0.5 mm thick, and the thinnest is on the eyelids.
Asterisks or vascular networks occur due to a deficiency in the body of vitamin D. This disease affects 90% of people.
The causes of skin aging are a decrease in the number of collagen and fibroblast cells, ultraviolet radiation, lack of sleep, stress.
On the skin of every person there are invisible stripes, they are called "Balashko Lines" in honor of the dermatologist Alfred Blaszko who discovered them in 1901. Under normal conditions, these lines cannot be seen, they become visible only with certain skin diseases.
Wrinkled skin on wet fingers serves the same role as treads on car tires, that is, it improves grip.
Freckles on the skin indicate that the body has a reduced level of melanin and the skin is extremely vulnerable to ultraviolet light. Most often, freckles appear in adolescents, and with age, they can simply disappear.