Douluo's power can control

"Owls' eyes have a large number of rod cells, which are the cells in the eye that mainly respond to weak light stimulation. They are very sensitive to the intensity of light."

"The eye structure of the Night Owl should be stronger than that of ordinary owls. In addition to the natural night vision ability, the perspective ability of the soul skill should also be related to the structure of visual cells in the eyes."

"So the best time for us to practice advanced fighting skills is at night full of moonlight and starlight, because only at this time can your third soul skill be at its best."

Li Si said to Narrator Jiang on the lakeside pavilion under the starry sky.

In his previous life, he learned some knowledge about vision through popular science channels.

The eyes of living things contain visual cells, also known as photoreceptor cells or photoreceptors.

Whether it is humans or animals, visual perception is carried out through visual cells, which is the nerve conduction of optical responses.

However, different organisms have different eye structures, and the cell composition and number of cell types in the eyes are also very different.

The visual cell is located in the deepest part of the retina. It is a cell that can convert optical stimulation into nerve impulses. It consists of four parts: outer segment, inner segment, cell body and end foot.

The photoreceptor cells are divided into cones and rods, which are responsible for the optical response, stimulation and processing of strong light response and low light response respectively.

Night owls are often seen at night.

That's because its eyes are filled with a large number of rod cells.

This type of cell is more sensitive to stimulation by low light.

Therefore, night owls can see things extremely clearly in the dark night.

But once it's daytime, only a small part of the cones in the eye are completely insufficient to process the strong light energy received by the eye.

As a result, the Night Owl became blind during the day.

Soul beasts like night owls only come out to hunt prey at night.

Li Si knew the principle of night vision. As for the perspective principle of the night owl, Li Si did not understand it because he did not have this kind of knowledge in his previous life.

However, although they do not understand it, it does not prevent them from utilizing this ability.

In the dark night, Jiang Narator was surrounded by three soul rings.

His eyes were a scarlet-like blood color, very eerie.

At this time, a month had passed since Jiang Narrator obtained the third soul ring.

During this month, they studied the structure of the human body under the stars every night.

Moreover, the objects of their observation include other people besides themselves.

From the Soul Emperor and Soul King to ordinary people, they have secretly observed them many times.

And under their observation, they found that the internal structure of soul masters was no different from ordinary people.

Just because of the soul power, the cell strength of the body's structure is higher, so that the strength and activity of the muscles, bones, and internal organs are also stronger.

After all, no matter how strengthened a soul master is, he is still within the scope of human beings.

The structure and composition of human beings are similar. The limbs, trunk, muscles, bones, and internal organs do not grow out of thin air.

'Om', 'Om'...

Suddenly, Jiang Narator's first and third soul rings lit up at the same time.

I saw a flash of red and purple light suddenly flashing in Jiang Narator's eyes.

Ultra-high-definition visual observation and perspective capabilities are turned on at the same time.

Just like the transformation of a beast possessed by a martial spirit, the structure of Jiang Naraku's eyes also underwent some changes under the influence of the spirit skill.

For a moment, Li Si, who was standing in front of Jiang Narator, felt as if he had been seen through.

This feeling is very strong, like being naked without any clothes.

"Share it with me."

Li Si stood there and said with his eyes closed.

This time, their partnership method is different from before.

He couldn't open his eyes to see, because Narrator Jiang would directly share what he saw to Li Si with his martial soul ability.

This is also another way to use Jiang Narator's red-eyed martial spirit.

In addition to visual energy sharing, field of view sharing is also possible.

That is, what I see is what you see.

In this way, Li Si can see himself clearly in the most complete and transparent way.

Otherwise, even if you use vision sharing, you can only see a corner of the internal structure of your body by lowering your head.

The reason for this is naturally because they have collected enough data and information.

Now, Li Si is preparing to initially experiment with the practice of advanced fighting techniques.

With sufficient preparation, he was [-]% sure that he could complete the first step of practice.

Buzz!

Later, Narrator Jiang shared his vision with Li Si.

At the same time, beside them, there was a pile of books and papers.

It records the movement frequency of various muscles, bones and internal organs in the human body.

There are also records of the function of various internal organs, of digestibility, and of how each organ is related to other body tissues.

Some of these things were collected from the book tower of Wuhun Temple.

Some of the ancestors of Wuhun Palace have also studied this kind of thing.

Li Si has been taking time to study the information recorded in these materials.

Moreover, during the month when Jiang Narator obtained the third soul ring, they used Jiang Narator's third soul skill to observe and verify the human body.

Later, under clear-view observation, they obtained a lot of new information about the internal organs.

For example, the operating frequency of the secretion system of the internal organs, the functional role of the connections between the internal organs, and the burden on the internal organs through breathing methods.

"call……"

Li Si closed his eyes and exhaled a long breath.

Although he closed his eyes, there was a clear picture in his mind.

The person in the picture is himself, the vision shared by Narrator Jiang.

As a breath of turbid air was exhaled from his lungs, Li Si clearly saw the changes in the movement of his lungs, as well as the changes in blood circulation and the related changes in other internal organs when the lungs contracted and the blood circulation changed.

Even the expansion and contraction of muscles and bones undergo movement changes.

It seems that every breath of the human body will directly affect the movement changes of the overall structure.

As the breathing volume and breathing frequency change, the internal changes in the human body also adjust, as if it is being affected, and it seems that the body is automatically adapting to the changes in active breathing.

"Next try variations of concentrated low-frequency breathing and high-frequency breathing..."

Li Si secretly said in his heart.

The breathing techniques recorded in advanced martial arts are very strange and elusive.

However, the left and right will not exceed the two modes of low-frequency breathing and high-frequency breathing.

At the same time, depending on the physical strength of different ages, the amount of air taken in during breathing is also different, so you need to slowly try and observe.

"Hoo~"

Afterwards, Li Si clenched his teeth, put his tongue on his teeth, and breathed at a low frequency through his nose.

It's about one breath every ten seconds, and the frequency is extremely low.

However, under this frequency of breathing, Li Si soon saw that the frequency of his internal organs movement increased several times.

One minute later, his bones and muscles began to contract.

After another 2 minutes, Li Si heard his heart beating more and more violently.

A dull feeling gathered in his chest, which could only be relieved with each breath.

At the same time, a feeling of dizziness followed.

Obviously, low-frequency breathing places too great a burden on the internal organs.

Insufficient oxygen supply causes the internal organs to undergo self-rescue movement changes.

On the contrary, this change causes the remaining oxygen in the body to be consumed too quickly, and the condition also declines.

If it goes on for a long time, I'm afraid I will die.

"call……"

Soon, Li Si returned to breathing at a normal frequency.

Suddenly, all kinds of abnormal conditions disappeared.

"No, low-frequency breathing places too great a burden on the body. There is a lack of oxygen supply, and the production of cellular energy is also reduced."

Through experiments, Li Si temporarily rejected the method of low-frequency breathing.

However, he has not really completely denied it.

Because we cannot draw conclusions from just one experiment.

It takes countless experiments to calculate an average.

At that time, the average value is the most accurate fitness of the human body.

"Next try high-frequency breathing..."

Later, after Li Si relieved his condition, he continued to experiment with breathing techniques.

The practice of advanced martial arts is divided into several steps.

Among them, understanding the structure of the human body and knowing the relationship between internal organs is one of them.

Then, adapting to the changes the breathing method brings to the body is the second step.

The third is to connect the influence of breathing method on internal organs to the movement changes of muscles and bones, so that it can obtain a short-term and substantial enhancement of body functions, and to subtly enhance physical fitness in a small way through breathing method.

Finally, the breathing method is combined with the operation of the twelve soul powers.

Let the cell energy generated through the breathing method be absorbed by the twelve meridians through the internal organs, and the soul power can be improved at a speed that is the fourth.

At that time, the absorption of natural energy during the operation of the breathing method can also be captured by the soul power flow.

Every moment a living body breathes, it is actually constantly repeating the process of sucking in and spitting out free natural energy.

However, without soul power as a medium, the free natural energy inhaled into the lungs cannot be directly absorbed by the body, and will instead be exhaled.

However, as long as the fourth step of advanced fighting skills is completed.

The soul power flow network inside the body can also have the most direct connection with the internal organs.

At the same time, due to the breathing method, the connections between the internal organs will also become explicit, allowing natural energy to flow into other internal organs through this explicit connection.

In this way, in a state of interlocking, natural energy can be absorbed by the soul power.

After completing these four steps, advanced fighting skills are considered to be complete.

At that time, the internal organs will have a direct and explicit relationship with the muscles, muscles and bones, and the short-term increase in body functions can be adjusted through breathing methods.

At the same time, maintaining the breathing method for a long time can allow the movement of internal organs to affect cell activity, which can permanently enhance physical fitness and body functions over a long period of time.

Cooperating with the absorption and feedback of soul power to cells, it can regulate the balance of internal organs and improve the strength of the body, as well as the activity of resistant cells in the body.

Whether it is to enhance physical function in a short period of time or to enhance physical fitness in the long term, theoretically speaking, it is achievable.

However, the premise is that nothing goes wrong, otherwise the consequences will be serious.

For example, the red archbishop of the Wuhun Main Hall in Nujia City is a living example.

Even in the realm of Soul Saint, if something goes wrong in practicing advanced fighting skills, he will be tortured to the point where he looks like a half-dead ghost.