From the point of view of blood physiology: what is the concept of donating 200 milliliters of blood? The total amount of blood in the human body accounts for about 8% of body weight, and the total amount of blood in an adult is 4000-5000 milliliters, and a donation of 200 milliliters of blood only accounts for 1/20-1/25 of the total amount of blood; in clinical medical practice, the general amount of blood loss of less than 600 milliliters of blood does not advocate a blood transfusion, so it can be seen that a donation of 200 milliliters of blood will never affect the health of the patient. The fact that you can't donate 200 milliliters of blood will not affect your health in any way.
The blood in the human body is not all involved in blood circulation, 20-25% of the blood is stored in the spleen, liver, lungs, skin and other "reservoirs", the spleen is the largest "reservoir" in the human body, can store 20% of the body's total blood volume. The spleen is the largest "blood reservoir" in the human body and can store 20% of the total blood volume of the human body. When blood is needed for blood circulation, the spleen releases blood continuously into the blood vessels to participate in blood circulation. Donating 200 milliliters of blood does not affect blood circulation, so how can it affect health? The blood components of the human body are very active in spitting out the old, about 1/120 of the red blood cells in the human body every day (i.e., 2 billion red blood cells) senescence, death, the average life expectancy of white blood cells is about 7-14 days, and the life expectancy of platelets is even shorter, about 7-9 days. Besides, the human bone marrow has a strong compensatory function, under certain conditions, the bone marrow hematopoietic function can be increased to 6-8 times the normal, a healthy person generates about 200 billion red blood cells and 120 billion platelets every day, i.e., the newborn blood cells of each healthy adult is equal to the total number of blood cells in the human body every year. After donating 200 milliliters of blood, the human body will soon be replenished, and will never affect the health.
There are many benefits to donating blood
A large number of scientific studies have proved that blood donation is good for health.
One can prevent and relieve hyperviscosity
Scientists have used blood rheology and hemodynamics to study the relationship between blood and blood donation, and have found that long-term adherence to moderate blood donation, in particular, the single donation of red blood cells and platelets and other tangible components, can make the blood viscosity significantly lower, accelerate the speed of the blood flow, the cerebral blood flow to improve, so as to achieve the alleviation or prevention of hyperviscosity, so that the person feels The body is relaxed, the mind is clear and full of energy.
Two, can prevent and reduce the occurrence of cardiovascular and cerebrovascular diseases
Qingdao, an expert has 127 repeated blood donors, 87 cases of hypertension, 60 cases of ischemic stroke for the controlled study of blood rheology, the results show that blood donors to reduce the occurrence of cardiovascular and cerebrovascular diseases have a positive effect; Finland, a research group of 278 42-60-year-old men surveyed, the results of which showed that blood donation has a positive effect on reducing cardiovascular and cerebrovascular diseases; a research group of 278 42-60-year-old men surveyed. A Finnish research group investigated 278 men aged 42-60, in which the proportion of those who had donated blood who suffered from coronary heart disease five years later was 86% less than those who had not donated blood; another group of studies, 1,532 people who had donated blood for l-2 times were followed up and observed, and the result was that only one person suffered from acute myocardial infarction, with an incidence rate of 0.043%, and of the 2,306 people who did not donate blood in the same period, there were 226 people had an acute myocardial infarction, the incidence rate of 9.8%, significantly higher than the blood group; the United States, a cardiovascular disease research group study also showed that, in three years, blood donors (men) suffering from cardiovascular disease is only 1/2 of the risk of non-donors.
Three, men donate blood to reduce the incidence of cancer
The body's iron content is too low easy to suffer from iron-deficiency anemia and slow action, too high is counterproductive. The high level of iron is counterproductive. Cancer International reported that when iron levels in the body exceed 10 percent of normal, the chance of developing cancer increases, and that donating blood in moderation can prevent cancer. The article also mentioned that women lose a certain amount of iron through blood loss during the menstrual cycle, so no significant relationship was found between women's iron levels and the development of cancer.
Four, can promote, improve mental health
Numerous studies have shown that a healthy mood can be communicated to the brain and other tissues and organs through the nervous system, body fluids, and the endocrine system to keep them in a good state, which is beneficial to the enhancement of human immunity and the improvement of resistance. Blood donation is a noble act that saves lives. While helping people and being kind to others, it also purifies one's spirit, comforts one's soul, and makes one's work and life more fulfilling. Doing good deeds to virtue and goodness, in fact, in helping others at the same time also help themselves, which is an important element of a long and healthy life.
Fifth, can prolong life
Overseas scholars have also been 332 people over the age of 66 (blood donors) and the same age, gender, 399 people (non-donors) for a prospective control study, the results show that:
The average life expectancy of blood donation group is 70.1 years old, higher than the average 67.5 years old group of non-donors;
The blood donation group's survival rate of 67%, higher than 40 percent of the group did not donate blood.
The survival rate of the blood donation group was 67%, higher than the 40% of the non-donation group;
The mortality rate of the blood donation group was 33%, lower than the 60% of the non-donation group.
China's "Blood Donation Law" stipulates that: when unpaid blood donors are in clinical need of blood, they are exempted from the payment of fees for blood collection, storage, separation, testing, etc.; when the spouses and immediate family members of unpaid blood donors are in clinical need of blood, they can be exempted from, or can pay less than, the fees stipulated in the preceding paragraph in accordance with the regulations of the people's governments of provinces, autonomous regions, and municipalities directly under the central government.