The human body is an organic whole, but each “part” to the aging process but there are first and second. Recently, experts from the Mayo Clinic revealed the secrets.
1, facial skin: women began to grow the first wrinkles at the age of 19 and a half; men began to appear at the age of 35 face skin dry, rough, sagging, facial contours are no longer clear.
2, lungs: 20 years old began to age. Lung capacity began to slowly decline from the age of 20, by the age of 40, some people began to pant. 30 years old, men will inhale 946 ml of air per breath, and by the age of 70, the number dropped to 473 ml.
3. Brain and nervous system: aging begins at age 22. Nerve cells in the brain will slowly decrease. 40 years old, nerve cells will be decreasing at a rate of 10,000 per day, thus affecting memory and brain function.
4, hair: men’s hair starts to turn gray after 30 years old, women start from about 35 years old. 60 years later, hair follicles become fewer and hair thinner. Black hair is because the hair contains a melanin, the body does not have a unified secretion of melanin glands, melanin in each hair produced separately, so the hair is always one by one graying.
5, breast: 35 years old began to age. With the reduction of estrogen and progesterone levels in women’s bodies, the breasts gradually age and sag. after 40 years old, the areola will shrink sharply.
6, muscle: 30 years old began to age. Muscles have been growing, decaying; growing again, decaying again. after 30 years old, the rate of muscle decay is greater than the growth rate. After the age of 40, people’s muscles began to reduce at a rate of 0.5% to 2% per year.
7, bone: 35 years old began to age. 25 years old before the bone density has been increasing. But at the age of 35, bone loss began to enter the natural aging process. 80 years old when the height will be reduced by 5 cm.
8, the heart: 40 years old began to age. As the body gets older, the heart’s efficiency in delivering blood to the whole body begins to decrease. men over 45 and women over 55 have a higher probability of heart attack.
9, teeth: 40 years old began to age. 40 years of age and older adults saliva production will be reduced. Saliva flushes away bacteria, and with less saliva, teeth and gums are more likely to decay. After the loss of gum tissue around the teeth, the gums will shrink.
10. Eyes: Aging begins at age 40. It will be very hard to see things up close. Then, the eyes’ ability to adapt to different intensities of light decreases, and they become more sensitive to flashing light, making them unsuitable for driving at night.
11, kidney: 50 years of age began to aging. The kidney filtration rate starts to decrease at the age of 50, with the consequence that people lose the ability to hold urine at night and need to run to the bathroom several times. 75-year-old people’s kidney filtration rate is half of what it was at the age of 30.
12, prostate: aging begins at age 50. Prostate enlargement triggers a series of problems including frequent urination. It plagues half of the men over 50. The normal size of the prostate is as big as a pecan and the enlarged prostate is as big as an orange.
13. Hearing: Aging begins around the age of 55. half of people over 60 will have impaired hearing due to aging. This is called age-related deafness. The walls of the ear canal become thinner, the eardrum thickens, and listening to high-frequency sounds becomes difficult for the elderly, so it is very difficult to communicate in crowded and noisy places.
14. Intestine: aging begins at age 55. A healthy intestine can find a good balance between harmful and “friendly” bacteria. The number of “friendly” bacteria in the intestine begins to decline significantly after the age of 55, and this scene will be especially in the large intestine. As a result, the body’s digestive function declines and the risk of intestinal disease increases.
15, tongue and nose: degeneration begins at age 60. Initially there are about 10,000 taste buds distributed on the tongue throughout life. after the age of 60 this number may be reduced by half, the sense of taste and smell gradually decline.
16, the vocal cords: 65 years old began to age. As we age, our voice will become soft and increasingly hoarse. This is because the soft tissue in the throat weakens, affecting the loudness of the voice. Women’s voices become increasingly hoarse and lower in pitch, while men’s voices become weaker and higher in pitch.
17. bladder: aging begins at age 65. at age 65, we are more likely to lose control of urination. At this point, the bladder will suddenly contract, even if the urine has not yet filled. If the bladder can hold two cups of urine at age 30, it can only hold one cup at age 70. The decrease in the stretch of the bladder muscles makes it impossible to completely empty the urine in it, which in turn leads to urinary tract infections.
18, Sexual organs: At the age of 65, 25% of people will have difficulty getting an erection and men will gradually develop ED. At the age of 55, women’s vaginas shrink and dry out, the vaginal walls lose elasticity, and intercourse becomes increasingly painful.
19, liver: aging begins at age 70. The liver seems to be the only organ in the body that can challenge the aging process. The regenerative capacity of liver cells is very strong. After surgery to remove part of the liver, it grows into a full liver within 3 months. The liver of a 70-year-old can also be transplanted to a 20-year-old if the donor does not drink or take drugs and has not suffered from infectious diseases.