Food can be swallowed in 3 seconds, but the digestion time in the human body will last all day. Dr. Dr Anton Emmanuel, an expert in gastroenterology at University College London, said that after food enters the stomach, it will decompose at a rate of 3-4 calories per minute with the help of gastric acid, and greasy food takes longer to digest. A 600-calorie dinner takes only 2-3 hours to digest in the stomach, and then 20 hours later, the food will enter the intestine for digestion.
However, the time to digest food will vary from person to person, and basically 16-30 hours belongs to the healthy range. A study by the University of Hawaii found that foods such as hamburgers can be digested for up to 3 days, while fruits only need 1 hour. Women, the elderly and patients taking antihypertensive drugs and antidepressants have relatively slow digestion. In addition, bad emotions such as anxiety can also lead to slower digestion. Intestinal inflammation such as irritable bowel can shorten the food digestion time to less than 16 hours.
2, wound healing: up to 2 years.
A study by Columbia University found that the healing process began after the wound was injured, but it took two years for the wounds such as surgical wounds to heal completely. It is found that the blood vessels will tighten to reduce bleeding less than 1 second after the wound occurs. Platelet coagulation helps to seal the wound. Substances such as calcium, vitamin K and fibrinogen will start to scab immediately. Scar tissue was formed after 3 months, and it was enhanced after 2 years, but it could only reach 80% of the initial skin tissue strength. Scientists say that factors such as diabetes, adrenaline and ibuprofen can inhibit wound healing. Factors such as aging and sleep apnea will hinder wound healing. Vitamin C plays a key role in wound healing. Without vitamin c, the wound is more difficult to heal.
3, get fat: 3 hours
A study by Oxford University found that dietary fat can enter the blood after meals 1 hour, and most of it can enter fatty tissues such as waist after 3 hours. If the total fat of a meal is 30 grams, the waist fat will increase by 2-3 teaspoons 3 hours after the meal. These fats are only temporary energy storage. But eating too much fat can easily lead to fat accumulation in the waist, which will lead to obesity over time.
4. Orgasm: 20 minutes for women and 3 minutes for men.
Many studies show that the duration of orgasm varies from a few seconds to half a minute, but there are gender differences in the time to reach orgasm: the average time for women is 10-20 minutes, while that for men is only 2-3 minutes. Professor John Stade, a gynecologist at the premenstrual syndrome and menopause clinic in London, said that the brain, heart and hormones all affect sexual desire and orgasm, so there are many variables in the orgasm time of men and women.
5. Blood compensation: 6 weeks
After transfusion or blood donation of about 568 ml, it takes about 24 hours to replenish plasma, but it takes 4-6 weeks to replenish red blood cells. The whole process of enriching blood begins with the kidney, and the cells around the renal tubules begin to secrete erythropoietin after sensing the decrease of blood oxygen. Male and female blood donors need to wait at least 12 weeks and 16 weeks, respectively, because men's blood iron levels are relatively high. (China stipulates that the interval between two whole blood donations is not less than 6 months)
6. Fertilization: 30 minutes
A study by the University of California found that it takes only half an hour for sperm to reach the cervix and combine with eggs in the fallopian tube. NIEHS research in the United States found that once an egg is fertilized, the pregnancy time will range from 37 to 42 weeks. Older pregnant women and women who gain too much weight during pregnancy will have a longer pregnancy time, and the specific mechanism is still unclear.
Dr. Victoria Beckett, an expert from the Royal College of Obstetrics and Gynecology, said that when the fetal lungs develop, a contraction command signal will be sent to the uterus to prepare for delivery. But in some cases, this signal will be earlier, leading to premature delivery. For example, the uterus is very large, pregnant with twins, gestational diabetes or inflammation around the uterus. Although it is normal to be pregnant at 37-42 weeks, a study published in the British Medical Journal last year found that children born at 37-38 weeks are more likely to suffer from asthma and gastrointestinal diseases. Dutch studies have found that children born after 42 weeks of pregnancy (usually driven by technology) are more likely to suffer from ADHD. The reason may be that the fetus is too big or the placenta lacks oxygen and nutrition.
7, nail growth rate: 2-4 mm per month
A study by the University of North Carolina found that the average growth rate of nails in 1938 was 3.55mm/ month and 3mm/ month respectively, which was related to the rich protein and various nutrients in modern people's diet. Too slow nail growth is a sign of poor diet. The study also found that the middle finger nails grow fastest and the little finger nails grow slowest because of the difference in blood circulation. Because of hormones, male nails grow faster than female nails. Because of sunshine and more vitamin D, nails grow faster in summer.
8. Urine after drinking water: 1 hour
Roland Reiss, a urologist at Hampshire Hospital in the United Kingdom, said that after drinking water (or other liquids), it enters the blood through the intestine, then it is filtered by the kidneys, sent to the bladder, and then excreted. The whole process takes about 1 hour. After drinking coffee, the process seems to speed up. But this is just a misunderstanding. The real reason is that caffeine stimulates the bladder and causes an increase in urination times. Alcohol is a diuretic. After drinking alcoholic beverages, there will be more urine and frequent urination. Normal urination is usually every 3-4 hours. Prostate hypertrophy and other conditions will increase the chance of frequent urination. Les said that both urinary symptoms and frequent urination may be signals of overactive bladder. The reason is that there is an error in the signal between the brain and the bladder, which causes the brain to send urination instructions to the bladder when the bladder is not full.
9. Brain growth period: 25 years.
David price, a professor of developmental neurobiology at the University of Edinburgh in the United Kingdom, said that before the age of three or four, it is a critical period of brain development, just like the "trunk line" of the telephone system has been laid, but some branch telephone lines have not been connected. After the age of 4, the brain will lose the ability to form a "branch telephone line". By puberty, except for the frontal lobe, the brain is basically fully developed. Brain development is not fully completed until the age of 25. A study found that teenagers' prefrontal tissue is obviously less than that of adults, and the tissue in this area will gradually increase with age. The prefrontal cortex of the brain is closely related to thinking, planning and impulse control. Teenagers are more likely to take risks, which is entirely related to the underdeveloped prefrontal cortex.
10, adolescence: 3-8 years old
Dr Mark Van der Pamp, an endocrinologist at the NHS Foundation in Royal Free London, said that girls' puberty usually starts at the age of 9- 12 and then lasts for 3-5 years. No growth is usually a sign of the end of adolescence, and women usually have two years after menarche. The puberty of boys usually begins at the age of 10- 13 and lasts for 5-8 years.
According to the latest research, because of estrogen, girls who develop earlier are at greater risk of breast cancer in the future than girls who start to develop at the age of 16. The later a girl enters puberty, the greater the risk of osteoporosis. Early puberty seems to have little effect on boys. However, American research shows that early puberty may lead to premature sexual activity and increased risk-taking behavior in boys.
1 1. Lung development: 18-22 years.
In teenagers and early twenties, lung capacity reaches its peak, and then gradually decreases. John henderson, a professor of pediatrics at the University of Bristol in the UK, said that the development of human respiratory system began in the uterus and was basically completed at16th week of pregnancy. After birth, the respiratory tract widens, and the airbag will continue to develop with the increase of the lungs. This process will run through childhood. Because women enter puberty earlier than men, their lung function reaches its peak earlier than men. Before the age of 20 for women and after the age of 20 for men.
Professor Henderson said that some factors will prevent the peak of lung function development. Parents' smoking, mothers' smoking during pregnancy, premature delivery, low birth weight, repeated lung infections and childhood asthma will directly affect the normal development of the lungs. These children are at greater risk of developing lung diseases such as chronic obstructive pulmonary disease (COPD) in the future.
12, menopause: 2- 10 years.
The average age of menopause is 5 1 year, but it is normal to enter menopause at the age of 40-55. Because of estrogen, menopause will increase the risk of breast cancer too late. Research by Cancer Research UK found that compared with 45-year-old menopausal women, the risk of breast cancer in 55-year-old menopausal women increased by 30%. However, premature menopause means premature loss of estrogen protection, which leads to an increased risk of osteoporosis, heart disease and stroke.
Write the health password on your face and read it for ten years!
Face-to-face diagnosis is a representation of the health status of internal organs in the main systems of human body, such as circulatory system, metabolic system, nervous system and immune system. Face-to-face diagnosis is the most direct and simple diagnostic method.
First, the eyes will tell you six passwords.
1, dark circles
Wake up in the morning and find it dark in front of you? Watch out! This may be because too much waste is deposited in the blood. The skin of the lower eyelid is relatively thin, which is the easiest to reflect blood color-poor circulation system; Think about whether you are under too much pressure recently, or are you tired? The metabolic dysfunction of the kidneys that dominate the urinary and reproductive organs can also make the eyes dull. Medical experts say that staying up late less and eating more whole grains is the best way to eliminate dark circles!
2, eyelid edema
I didn't drink much water before going to bed, and my eyelids were still swollen when I got up in the morning. You may have a fluid disorder! There are many reasons for water metabolism disorder. If you feel weak and thirsty in your lower limbs, there may be something wrong with your kidneys. A healthy kidney can smoothly excrete excess water from the body. When water is insufficient, it will slow down metabolism and store water in the body, thus causing mild edema. Don't worry, drink a few glasses of water and you'll soon get a pair of electric eyes back!
3. Fat particles
In addition to suggesting that you use oil-free eye cream to treat fat particles under your eyes, medical experts also tell you that fat particles are a warning signal of high cholesterol in your body. Eat less fried food and animal offal, eat more fresh fruits and vegetables and supplement organic sulfur or antioxidants, such as blueberries and cranberries. And annoying little particles will soon disappear!
4, red blood
Congestive "golden eye" is a warning signal of poor blood circulation. Don't be busy with eye drops, drink a cup of cold boiled water, exercise your head, neck and shoulders, dredge the blood flow of upper limbs, and have a good sleep to let your eyes rest fully, which can reduce congestion.
5. Eye of a needle
Don't underestimate the long eye of a needle. Japanese medical experts have found that a long needle eye means that your immunity declines, and bacteria easily enter your eyes from the root of eyelashes, causing inflammation. If there are repeated pinholes, you'd better go to the hospital for a comprehensive health check-up. Often drink Buzhong Yiqi decoction to improve your immunity, and you can completely "break up".
6. The whites of the eyes are yellow
Maybe there's something wrong with the liver and gallbladder. Bile is a yellow-green liquid. When the gallbladder or liver is out of balance, bile will flow into the blood, making the whites of the eyes yellow. Maybe you didn't eat breakfast or did it carelessly. Drink a glass of white water first thing in the morning. Pay attention to eat less greasy food, mainly vegetables, fruits and miscellaneous grains, and regulate the liver and gallbladder.
Second, the six passwords that the mouth tells you.
7. Pale lips
Lips are as thin as lower eyelids, which can fully reflect blood color. If the lip color becomes lighter, it may be a lack of red blood cells. It is suggested to change diet and eat more beans. Red dates, red beans, pig blood and fresh vegetables all have good blood-enriching effects, thus alleviating anemia symptoms.
8, the lip color is too red
If your lips are too bright red or purple black, don't be complacent. Maybe you have a fever. Traditional Chinese medicine divides heat into "excess heat" and "deficiency heat", which is caused by the decrease of water in the body. When the body temperature rises, the regulating function of the body is weakened, and the cheeks, lips and tongue will turn red locally. Eating more fresh fruits and drinking more water can help you dissolve excess calories in your body and make your lip color return to normal. Violent black shows that your liver and heart are pathological. You should make a diagnosis in time and take a diet plan. Please don't take medicine and overtreatment at will unless you have to!
9. Broken corners of the mouth
Feeling sharp pain in the corners of the mouth, even redness and rupture, is likely to be an early warning of gastritis. When the gastric mucosa is in a state of fatigue, it will cause internal heat, leading to oral swelling. However, 80% of early gastritis can be cured. It is recommended to chew several times when eating to fully absorb and digest food. After the temperature of the stomach wall decreases, the redness and swelling of the mouth will soon disappear; Pay attention to the digestibility of diet, and don't eat raw and cold food.
10, dry lips
Although the lips are mucous membranes, the biggest difference from the skin is that there are no sweat glands. Lips can't secrete oil and store water, and they need oral mucus to moisten them. When the mucus is insufficient, the lips are easy to dry and the resistance is weakened, and bacteria and viruses just take advantage of it. Besides drinking plenty of water, it is also recommended to rinse your mouth with salt water. Salt is a great driving force to promote the production of oral mucus.
1 1, bad breath
Take a deep breath in front of the mirror. If you smell "bad breath", you should pay attention: more than 60% of "bad breath" is caused by dental diseases. When bacteria invade the gap between root and gum, it will cause gingivitis and produce unpleasant breath after reproduction. In addition, the oral cavity is not thoroughly cleaned, and the tartar formed by food residues will also make you exhale unpleasant smells. Only by thoroughly washing your teeth can you solve the problem; Note that you may be caused by acidic constitution, or you may be constipated for a long time except for your mouth. You can exercise more, give priority to vegetables and fruits, and eat less animal protein and fat.
12, drooling
When I wake up in the morning, I always find a circle of saliva dripping on my pillow? Drooling is due to excessive saliva secretion, which may be due to weak gastrointestinal function, which can not fully absorb water, resulting in water retention, and saliva is diluted before it flows into the mouth. If you still feel bowel sounds and stomach sounds, you should pay attention to the changes of gastrointestinal diseases.
Third, the tongue tells you six passwords.
13, tongue chattering
Stick out your tongue in front of the mirror. If your tongue trembles slightly, it is probably a sign of mental stress and physical decline. Medical investigation found that more than 70% people are not aware of the war of words. It is recommended to adjust the schedule as soon as possible, and don't stay up late, otherwise you will be nervous!
14, purple tongue
When the blood contains a lot of waste and the water in the body is insufficient, hypoxic blood and oxygenated blood will mix together, making blood vessels turn purple. If accompanied by shoulder stiffness and low back pain, it means that there are too many toxins in the body, the microcirculation system is not smooth and the metabolism is disordered. It is advisable to keep a light diet and take steam bath and sauna to speed up the discharge of toxins.
15, tongue coating is too thick
The tongue coating on the tongue is as easy to scrape off as tofu residue, which may be due to gastrointestinal dysfunction or overeating. If the situation persists, we must pay attention to adjusting the function of the spleen and stomach.
16, tongue coating is too thin
The tongue coating falls off inexplicably, and the tongue surface is mottled and uneven, which is called "map tongue" in medicine. People with allergies are prone to occur, especially in spring and autumn. It means that your resistance is declining. It is recommended to stay away from allergens such as pollen and seafood during this time to avoid being recruited.
17, yellow tongue coating
Yellowing of tongue coating is probably a sign of cold! Pay attention to keep warm, eat more warm foods such as pumpkins and fruits containing VC, and soak a cup of hot soybean milk before going to bed at night. A protein membrane can be formed in the stomach to prevent bacteria from invading.
18, black tongue coating
This is probably because the body temperature has increased, but it is not necessarily a fever. Violent exercise and burning in anger can make the tongue coating black. Taking a hot bath and doing some relaxation exercises can effectively lower the body temperature.
Fourth, the nose will tell you six passwords.
19, nose size
The size of the nose is closely related to the breathing condition. A wide nose and a high nose indicate that your respiratory organs are developed and you can breathe enough air. But in places with serious pollution, you will also inhale too much waste. If your nose is petite, it means that your breathing function is weak, and a closed place will make you short of breath and chest tightness. After staying in the office for an hour or two, go to the stairwell or window to breathe fresh air for five minutes to prevent lack of oxygen.
20, nose tilt
When breathing normally, the nose is crooked, which may be caused by low vital capacity! Don't take it lightly. Low vital capacity will affect your normal metabolic function. Practice abdominal breathing for five minutes every day-inhale and exhale, and soon your vital capacity will increase a lot!
2 1, nasal tip acne
The acne on the nose is mostly due to digestive system problems. Eat more bananas, sweet potatoes and other foods to keep digestion smooth, which can relieve symptoms; The pustule on the tip of the nose is your bladder problem. Check and change your diet to vegetarian and light.
22, the nose is red
This may mean that the liver is overloaded. When drinking too much, in order to decompose alcohol, the body will retain blood in the liver, leading to microvascular dilation, so it is very important to control the amount of drinking, rest on time and pay attention to breakfast.
23, sometimes nosebleeds
People with weak stomach and intestines can't absorb enough nutrients, and muscles and vascular tissues are easily broken when they collide slightly. In winter, high energy consumption, irregular diet and insufficient calories in the body will lead to occasional nosebleeds. Might as well treat yourself well and replenish enough energy.
24, nasal congestion
If it is caused by allergic rhinitis, it may not only lead to dyspnea, but also make the brain anoxic and dull. Nasal congestion represents the fragile function of respiratory mucosa. Japanese medical research has proved that this is mostly related to poor gastrointestinal function. Not patronizing a smooth nose is as important as maintaining the gastrointestinal tract.