Why does the heart muscle keep beating tirelessly?

We are accustomed to being a very complex creature, because this complexity is reflected in the fact that the functions of each organ inside our body perform their own functions, and each organ has a connection, using the blood in it for material exchange and material nutrient intake. Therefore, all organs of the human body can maintain the normal activities of our human beings, so they also rely on the tireless work of these organs, so about the most important organ in the human body: the heart, why can the heart muscle in the heart beat tirelessly?

The main reasons for this are as follows. <>

1. About the reason why the heart beats. First of all, the first point is about the reason why the heart beats, but it is very simple, it is the electrical signal sent by the sinus node that directly causes the heart muscle to beat. So the main reason why our heart can beat is because of the electrical signals sent by the sinus node, when the sinus node cannot send electrical signals, our new machine will not be able to continue beating.

When the heart muscle cannot receive the electrical signals sent by the sinus node, our heart muscle will lose its function and lose a new normal beat, so the heart muscle is very important for the normal function of our heart. <>

Second, this blood brings abundant nutrients to cardiomyocytes. In addition, after all kinds of arterial blood returns to the heart, it can bring rich nutrients and oxygen to the cardiomyocytes, and the cardiomyocytes can continue to contract, and the resulting contractions will be supplied to the organs of the body with a blood**, blood flows everywhere, so that the whole body can maintain a normal blood flow. <>

3. If you work all the time, then people also represent facing life. Eventually, if the heart muscle stops working, then a person will also face death, because it represents the beating of the heart, and the blood inside our body cannot be transported to the organs that need oxygen in time. Then these organs will lead to necrosis due to ischemia and hypoxia, which will cause our body to not function normally, which will lead to the situation that the whole body will be affected by the whole body.

The myocardial fiber bundles are connected to each other to form a continuous network structure with myocardial cells as a unit, so that myocardial cells can work synchronously, and such a structure can keep the internal signals coordinated, so the myocardium operates as a whole, whether it is contraction or relaxation is carried out together.

1. About the reason why the heart beats.

Second, this blood brings rich nutrients to the heart muscle cells, and third, if you work all the time, there will be no life.

Because the function of the heart is to make blood for the human body, it beats through pressure.

The heart is the "perpetual motion machine" of the human body, which allows the organs of the body to get nutrients by constantly beating. At the same time, when the blood flows through the heart, it also receives nutrients for its own use. It's like a circulatory system, absorbing and releasing energy at the same time.

However, we must understand that the heart is not "never tired", and its beating is mainly due to a human structure - the sinus node.

The sinus node is a pacemaker in the heart, and its autorhythmia is the highest in the heart, which can emit 60-100 impulses per minute under normal conditions. When we say the heart beating, we are the impulses emitted by the sinus node. The cause of impulsivity is the high automaticity of the sinus node cells.

1. Why does the heart beat The beating of the heart is actually contraction and relaxation. For people, it is in motion almost day and night, and it does not dare to slack off. So people gave it a saying, "never get tired".

As long as you don't die, your heart will always beat. In fact, this is a circulatory structure, the blood of the human body has to flow through the heart, and only when the heart is constantly beating, other organs can harvest nutrients. As the blood flows through the heart, it also gets nutrients from it.

Constant contraction and relaxation allow all the organs of the body to work perfectly so that we can survive normally. It's a complete structure, like the one we see in the current delivery structure, which uses electricity itself and transmits electrical energy to other places that need it.

2. Not "never tired" In fact, the heart is not "never tired", it will become slower and slower as you get older. Until the person dies, the heart stops beating completely. In addition, there is a saying that contraction and relaxation are contractions, and some people believe that relaxation means that the heart is resting.

A contraction and diastolic constitute a beat, and each beat takes about seconds, where contraction occupies the second and diastole occupies the second.

In other words, for every second worked, there are seconds of rest. In other words, the ratio of work and rest time is 7:1.

Of course, this is just a statement and cannot be fully interpreted as the heart is resting. At least from a human perspective, it's constantly beating. Once stopped, it means death.

3. When it comes to the beating of the heart, we have to mention the sinus node, as the pacemaker with the highest autorhythm of the heart, it governs the contraction and relaxation of the heart. Of course, other ventricles are also constantly impulsive to support the heart's beat, but the main one is the sinus node. In life, you can also see some earthy love words, such as "I want you to be my sinus node", "you are my sinus node", we can understand as:

You are the most important person to me, and my heart cannot beat without you.

Because there is energy for the heart to beat, it is an energy conversion and circulation.

Because the human body needs it, and for life to be maintained, it has to beat all the time.

Because the heart contracts and relaxes once, this is called a cardiac cycle. That is, one beat, which includes atrial contraction, atrial diastole, ventricular contraction, and ventricular diastole. Blood flows in one direction in the heart, from the atria to the ventricles and from the ventricles to the arteries.

Thus, the ventricles rest when blood flows to the atria and atria rest when blood enters the arteries from the ventricles. So the heart is resting and working all the time.

That's because there are a lot of nutrients in the body, and the blood circulation is also very smooth, so the heart will never tire of beating.

Because human life is mainly supported by the heart, the beating of the heart will also maintain the life of the human body, so the heart will beat all the time.

It is because the heart supports the operation of the entire human body, and the heart also has a lifespan, and it is not able to beat all the time.

Because the heart is the most important organ in our body, if the heart does not beat, we will die.

In a person's life, the heart never stops beating. Many people have been amazed at this phenomenon since ancient times: Does the heart not know tiredness?

The mystery of the "never tired" of the heart was unsolvable in ancient times. As science progressed, the mystery was finally revealed.

As the heart contracts, it squeezes out blood from one end, then relaxes and sucks in blood from the other end. The contraction and relaxation of the heart is what we usually call a beat of the heart. The heart is constantly contracting and relaxing, and the blood is flowing endlessly.

Both the atria and ventricles contract and dilate, but the time taken is slightly different. It takes about a second for the heart to beat. In this second, it takes only seconds for the atrial to contract, and there are seconds for diastole; The ventricles contract in seconds, and the diastolic time is seconds.

Diastolic is relaxation, and relaxation is actually the same as rest. So, it looks like the heart is constantly working, but it is actually at rest most of the time. It can both work and rest, and the combination of work and rest is excellent.

The heart beats to ensure that all organs of the body receive normal nutrients. In turn, when a large amount of blood is constantly flowing through the heart, it itself receives more nutrients. Because the heart always has sufficient nutrients, and it can fully "digest" and "absorb" itself, it appears strong and powerful, not easy to get tired, and can be energetic and energetic all the time.

In 2010, he was awarded the unified examination of junior high school academic level in Liaocheng City, Shandong Province.

The mystery of never getting tired.

Everyone has tasted fatigue and knows that rest is the best way to get rid of it. So, can we never get tired?

Physiological knowledge tells us that there is a material basis for fatigue, which is the continuous release of carbon dioxide, lactic acid and other "waste products" by cells during metabolism. Of course, the human body relies on its own complete physiological functions, and is constantly transforming or exporting these substances out of the body. When people work for too long or too intensively, the amount of metabolites produced will greatly exceed the amount of human physical transformation and output, so that they accumulate in the body.

When this accumulation reaches a certain value, the body will develop a feeling of fatigue, and the degree of fatigue is directly proportional to the amount of metabolite accumulation. When the body is resting, the metabolites accumulated in the body are gradually converted and transported, and when the accumulation of metabolites drops below the value, fatigue disappears.

Human physiologists have found that the human heart has an astonishing amount of work. Based on its average contraction of 70 times per minute, it reaches 1 million times a day, and its blood volume is enough to fill a tank of oil. But the heart never gets tired, why is that?

Because the heart is in the "complete refractory period" immediately after each contraction, the "sign" of "now I rest, do not disturb" is hung out, and it can be seen from the electrocardiogram that the time between the heart working and resting is 3:5, that is to say, in a day, the heart only works for 9 hours, and the rest time is up to 15 hours, and it rests before fatigue. This is the secret of the heart's ability to never get tired.

When people know the secret of the heart never tired, they also made a lot of interesting faces, such as Dr. Verderick Taylor, a scientific management engineer of the American Bedham Steel Company, found that if a strong worker was asked to move pig iron for 8 hours a day, he would be exhausted by the end of the day, and the number of pig iron he moved was tons. Later, Dr. Verderick Taylor asked the worker to work only 26 minutes per hour and then rest for 34 minutes. As a result, he carried 47 tons of pig iron in eight hours without any fatigue.

Experiments have confirmed the idea that if you rest before fatigue, you will always have enough energy and stamina, and you will never get tired.

So, how do you rest before you get tired? There are a variety of approaches that can be taken according to each person's actual situation. Such as:

A typist can rub his eyes and stretch his arms to look out the window after printing a document; Field workers can drink a cup of tea or sit on the ground to rest in the interval between operations; or try to make use of the break to do exercises; Or plan your day's workload, arrive a few minutes early and prepare for ......Henry Ford, an American business management scientist, once said: "I will never stand when I can sit down, and I will never sit when I can lie down." This sentence speaks to the dialectical essence of work and rest.

Because there are coronary arteries that supply blood to the heart non-stop! It is divided into left and right ventricles and atria Right Beat Left Arrest We know that the beating of the heart is done by the contraction and relaxation of the heart muscle. Each contraction and diastolic process of the heart is called a cardiac cycle.

In a cardiac cycle, both atria contract at the same time, followed by atrial diastosis, and immediately after the atria begin to relax, the ventricles contract almost simultaneously, then the ventricles dilate, and then the atria begin to contract again to enter the next cardiac cycle. The heart is constantly contracting and relaxing, pushing blood circulation.

Since the heart is always beating, why not feel tired? This is because during a cardiac cycle, the heart naturally relaxes after systole and enters diastole. During this diastolic period, the heart is fully rested.

Assuming that a person's heart rate is 75 beats per minute, a cardiac cycle lasts an average of seconds; The systolic phase of the atria accounts for seconds; followed by diastole; The systolic phase of the ventricles takes up seconds, and the diastolic phase is seconds. During the pre-ventricular diastolic seconds, the atria are also in diastolic for a second-to-second period. This shows that the heart muscle is fully rested during this time, and of course, it does not feel tired, so that the heart keeps beating rhythmically and repeatedly.

The trick to not getting tired is the trick to a heart beating billions of times in a row. Scientists have confirmed that the energy of the heart itself is unique, and the combination of work and rest is cleverly arranged. The blood vessels of the heart itself are called coronary arteries, which open at the beginning of the aorta.

Blood ejects from the left ventricle and first flows through it to the heart, which is characterized by short distances, high pressure, and high blood flow. The heart weighs only 10% of the body's weight, but it gets 5% and 10% of the body's blood**. When coronary atherosclerosis causes the lumen to become thinner and the blood supply is insufficient, it is called "coronary heart disease"; If the coronary artery is blocked by some reason, causing myocardial ischemia and necrosis, it is called myocardial infarction.

Let's analyze the ratio of work to rest in the heart. If the heart beats 75 times per minute, it is counted as seconds for every contraction and relaxation. Atrial contraction takes up only seconds, and diastolic takes up seconds; Ventricular contractions, on the other hand, occupy seconds.

Diastolic in seconds. It can be seen that both the atria and the ventricles rest much longer than they work. This clever arrangement of the heart's work, coupled with its unique blood supply conditions, ensures that the heart continues to beat for decades without fatigue.