The human body is an organic whole, but each “part” to the aging process but there are first and second.
I. Facial skin.
Women at the age of 19 and a half began to grow the first wrinkles; men at the age of 35 facial skin began to appear dry, rough, sagging, facial contours are no longer clear.
Second, the intervertebral discs.
The intervertebral disc is one of the earliest degenerative organs in the human body, starting at about 20 years of age, is affected by a variety of factors occurring irreversible degenerative change process.
Third, lung.
Aging begins at age 20. Lung capacity begins to decline slowly from the age of 20, and by the age of 40, some people begin to be short of breath. at age 30, men inhale 946 ml of air per breath, and by age 70, this figure drops to 473 ml.
IV. Brain and nervous system.
Aging begins at age 22. Nerve cells in the brain will slowly decrease. after 40 years old, nerve cells will be decreasing at a rate of 10,000 per day, thus affecting memory and brain function.
V. Hair.
Men’s hair starts to turn gray after 30 years old, while women start around 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 gray.
VI. Breasts.
Aging begins at the age of 35. As women’s body estrogen and progesterone levels decrease, the breasts gradually aging, sagging. after 40 years old, the areola will shrink sharply.
Seven, muscle.
Aging begins at age 30. Muscle has 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 begin to decrease at a rate of 0.5% to 2% per year.
VIII. Bones.
Aging begins at age 35. bone density has been increasing until age 25. But at 35 years old, bone loss began to enter the natural aging process. 80 years old when the height will be reduced by 5 cm.
IX. Heart.
Aging begins at age 40. 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 having a heart attack.
X. Teeth.
Aging begins at age 40. the amount of saliva produced by adults over the age of 40 decreases. Saliva flushes away bacteria, and with less saliva, teeth and gums are more likely to decay. Gums shrink with the loss of gum tissue around the teeth.
XI. Eyes.
Aging begins at age 40. It can 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.
Twelve, the kidneys.
Aging begins at age 50. The kidney filtration rate begins to decrease at age 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 age 30.
XIII. Prostate.
Aging begins at age 50. Prostate enlargement triggers a number of problems, including frequent urination. It plagues half of all men over the age of 50. A normal prostate is the size of a pecan and an enlarged prostate is as big as an orange.
XIV. Hearing.
Aging begins around the age of 55. half of the 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.
XV. Intestinal tract.
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 played out especially in the large intestine. As a result, the body’s digestive function declines and the risk of intestinal disease increases.
Sixteen, tongue and nose.
Degeneration begins at age 60. Initially there are about 10,000 taste buds distributed on the tongue throughout life. after age 60 this number may be reduced by half, and the sense of taste and smell gradually decline.
Seventeen, the vocal cords.
Aging begins at age 65. 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.
XVIII. 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 stretch of the bladder muscles prevents the urine in it from being completely emptied, which in turn leads to urinary tract infections.
XIX. Reproductive organs.
At age 65, 25% will have difficulty getting an erection, and men gradually develop ED. At age 55, women’s vaginas shrink and dry out, the vaginal walls lose elasticity, and intercourse becomes increasingly painful.
XX. 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 surgical removal of part of the liver, it grows into a complete liver within 3 months. The liver of a 70 year old can be transplanted to a 20 year old if the donor does not drink or take drugs and has no infectious diseases.