The blood volume in the human body is about 7%-8% of the body weight. For example, the weight of 50kg will be about 3500-4000mL.
These blood are not all in the blood vessels. 20%-25% are stored in the spleen, liver and skin. When the human body urgently needs blood, if it engages in vigorous activities or loses a small amount of blood, the spleen will continuously release the blood in reverse circulation to maintain the normal physiological function of the human body. Blood vessel rupture caused by various reasons can cause bleeding.
If the blood loss is relatively small, no more than 10% of the total amount, it can recover quickly through the body's self-regulation. If the blood loss is large, reaching 20% of the total amount, symptoms such as accelerated pulse and decreased blood pressure will occur. If the blood loss reaches more than 30% in a short period of time, life-threatening.
A type, B type , AB type, O type blood , which blood type is better? What blood type are you?
A blood
A blood is a very common blood type. It is not a rare blood type is a great advantage. In daily life, various accidents will inevitably occur in the human body. When an accident occurs, if it belongs to a rare blood type, blood supply will be very difficult. People with accidents may die. People with type A blood don’t have to worry at all, because the blood bank of major hospitals is not short of type A blood.
Because people with type A blood skillfully have a good hand and feet, strong tolerance, they will not be troubled by diseases in normal times, and the probability of sub-health will also be reduced. However, due to the high blood viscosity, weak digestive system function, and low gastric acid content, the probability of suffering from cerebral infarction and digestive system diseases is relatively high.
B blood
B blood has strong digestive function and adaptability, and can adapt well to various foods. Almost all kinds of beneficial nutrients can be digested and absorbed. Whether eating animal food or plant food, their metabolism is fast and efficient.
As the pace of life accelerates, people's work pressure is getting greater and greater. They are in a high-pressure environment for a long time, which is very likely to cause chronic fatigue syndrome . Moreover, with the changes in the climate, people with type B blood have poor defense ability to influenza virus and are prone to cold.
AB blood
A blood is the latest blood type on the earth, but the number of people is increasing. It can be seen that type A blood is highly adaptable, not affected by environmental changes, avoiding health changes, and also contains two types of antigens, , type A and B, which have dual characteristics. To some extent, it has the dual advantages of type A and type B blood.
Because people with ab-type blood have good vegetarian metabolism and poor meat metabolism, eating meat for a long time is likely to form fat accumulation, leading to obesity; in addition, because the cholesterol content is relatively higher than that of hyperlipidemia, the incidence of cardiovascular and cerebrovascular disease has increased significantly.
O blood
O blood people have strong autoimmune functions and resistance, which can protect the body from various diseases and viruses. A survey shows that although people with O blood type are plagued by "small diseases" in their daily lives, their average life span is significantly longer among various blood types.
Of course, no one is perfect. Although people with type O blood have a long lifespan, they also have some health disadvantages. Their blood is thin, which is not conducive to blood clotting, the thyroid function may be unstable, and the insulin content is much lower than other blood types, which makes them prone to diabetes .
What are the factors that affect physical fitness?
Genetic
Genetic impact on health. If members of their family have poor physical fitness, it means that they have poor congenital conditions. Compared with the average person, this group of people needs to spend more time on conditioning. In addition, even if the congenital conditions are not good, they can be improved through acquired efforts, so you don’t need to worry too much, but you still need to take good care of your daily life.
emotion
good emotions are the basis of health, but many people have high incidence of emotional diseases due to stress, external influences and other factors. At this time, you must pay attention to conditioning. Through scientific methods, you can quickly restore your emotions to the best state. For some people with serious psychological problems, it is recommended to use drugs for targeted treatment.
Geographical environment
Geographical environment will also have a certain impact on the human body. For example, people in the south will be thinner, while people in the north will be stronger. Therefore, the adjustment methods are also different under different climatic conditions, so it is recommended to pay more attention.
Life Habits
Poor living habits will affect your health, such as staying up late for a long time, lack of sleep, eating unhealthy foods, etc. If you are under the influence of unhealthy living habits for a long time, it is easy to lead to bad health.
Reading extension - Physical fitness includes five aspects
speed quality
is a ability to move a distance within a unit of time or respond to external stimulation fast and slow; strength quality is the power generated when certain muscles of the body contract.
Endurance quality
refers to the human body's ability to perform muscle activities and resist fatigue for a long time;
Sensitivity quality
refers to the ability to quickly change position, change movements and adapt to changes.
Flexibility
refers to the elasticity and stretch of muscles and ligaments of each joint during human activities.
Endurance quality
refers to the human body's ability to resist fatigue when muscle activities are carried out for a long time. Endurance quality is a comprehensive manifestation of the system functions and psychological qualities of various organs in the human body, and is also an important symbol of the strength of a person's physical fitness.
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