Xia Chenghao didn't dare to speak, for fear that he would spit out all the things he had eaten in the morning with one mouth. The numb scalp was lit like pounding garlic, and a few of the children in the back had already spit out, and even one was sobbing profusely.

The man in black who came with him picked up the crying child and threw him to the side of the operating table, and a scalpel pierced the operating table next to his face in a quarter of a second, and if he still cried, he would be executed on the spot.

The child was stupid, staring, and afraid to come out.

When he dies and faces the death of others, his own death is even more terrifying, the child bit his lip to hold back his cry, and stood up tremblingly and stood aside.

In the face of such an episode, the man in white only sighed softly, and then continued the lecture: "Although humans are much worse than insects, in general, the human bone structure is quite strong and reasonable. ”

Xia Chenghao still remembers "100,000 Whys" in the host of the Super Academy, which said that some animals can jump to a height of 2,000 times their height, and some animals can easily lift objects weighing a thousand times, all because they have special body structures.

"If you put a piece of paper on a table, it will naturally bend and fall due to gravity, but if you roll it into a paper tube, even if you put a book on it, it doesn't hurt. The leg bone is such a hollow tubular structure that can withstand heavy pressure up and down, but it is necessary to pay attention to the blow of lateral force. ”

"Whether the human body is strong enough depends on how its owner organizes the power structure and how to avoid the opponent's directional attacks." Xia Chenghao thought secretly in his heart.

"What do you think?" The man in white seemed to see that Xia Chenghao was starting to be distracted, and scolded coldly, "Take the bones out,"

The child did so, painfully pulling the bone out of the corpse's thigh.

The man in white gently picked it up and looked at it, then handed it back to Xia Chenghao and said, "Pass it down one by one and see who can break it." ”

Staring at the leg bone covered with blood, Xia Chenghao's legs became weak, and his back began to be soaked with cold sweat. The other children did not feel better, taking the leg bone from the previous person's hand, holding the ends tightly, but not moving, and some tried their best to fail.

When it reached the last child, he used all his strength, and after a roar and a crunch, the leg bone finally broke. The man in white reached out and retrieved the two leg bones, easily folding them into a dozen pieces, as if breaking crispy cakes.

"Look at the hollow structure." The things in the hands of the man in white were thrown on the stage, and the children came over and each took a section, and those who didn't get it looked at the neighboring section.

"This is the bone marrow, and all the blood of the body comes from that."

Xia Chenghao looked at Bai Sensen's bone marrow, and felt a little like vomiting, every time he tried his best to calm his stomach, but from time to time a new sense of stimulation came up.

"The surface of the bones can be examined as a recipe for this man's life." The man in white looked at Xia Chenghao's surprised gaze and explained lightly: "There are two main things that people eat, sugar and protein. The carbon-14 in sugary foods and the nitrogen-15 in protein foods are deposited on the bone, and the levels of these two isotopes are different in each food. ”

Xia Chenghao nodded, knowing that this was emphasizing that in the process of killing and destroying traces in the future, the destruction of the bone marrow was particularly important.

The man in white turned to the upper body of the corpse: "The ribs belong to the flat bones, which can transmit the pressure to both sides like an arch bridge to cushion the blows of external forces, so the ribs can well protect the heart, lungs and other organs in the body." ”

He quickly removed the twelve arch-like bones and said to the children, "The chest cavity is incomplete in protecting the vital organs of the human body, it has too many gaps that the killer's fists and fingers can easily penetrate the body. ”

The man in white glanced at Xia Chenghao coldly, and then said, "The sharp blade was inserted between the third and fourth, just cutting off the heart artery. If the knife is thin enough and pulled quickly enough, the blood will quickly fill the chest, the pressure on the muscles will not let the blood spill out even a bit, and the wound will heal before the body cools down, and it will look fairly clean, and it may be killed as if the artery had ruptured. ”

The children were stunned, it turned out that there was such a silent method of killing? As I said before, killing people silently and silently in the downtown area, will this trick be used in one of them?

"The vital parts of the human body are on the central axis of the body, and damage to every point of this line can be fatal, and you should especially remember it."

Xia Chenghao looked at the corpses that had been scattered in a daze, and his mouth was troubled to deal with the answer.

"The genitals are also on the midline, which is the most fragile of the fragile organs, and although the eye is more susceptible to trauma than it, the eyeball itself does not have a pain nerve and does not cause a chain reaction. The genitals are rich in nerves and can be disabling with severe pain when hit hard. Many self-defense techniques or martial arts are very concerned with striking and protecting against this. The man in white glanced at Xia Chenghao, meaning to ask if he could understand.

Xia Chenghao felt that there was pain between his legs, and he had the urge to reach out to protect him, for fear that the man in white would experiment with himself.

No one paid attention to his feelings, and the man in white took out the internal organs from the corpse, such as a few family treasures, "This is the heart, this is the lung lobe, this is the spleen, and the liver ...... here." You have to write them down one by one, and you will use every fatal knowledge in the future. ”

The children used their hands together, following the instructions of the man in white, up and down on their bodies, so that they did not have to touch the bloody corpse.

As the lesson progressed, the scalpel had already cut through the entire belly, the intestinal structure came into the children's sight, and the air was filled with an unbearable stench.

The liver lobes and kidneys are set aside, and the entire dissection table looks like a pork stand.

Resisting the urge to vomit, everyone remained calm.

The man in white suddenly threw away the internal organs in his hand, turned his head and said loudly, "Everyone knows that people have five senses and six senses, if you had to give up the basic functions in it, what would you choose?" ”

Someone shouted, "Smell! ”

The last thing I want now is smell, the stench of those internal organs is more unpleasant than what the eyes see, and if you can't smell it, maybe you won't be disgusting.

"You don't think that smelling doesn't have the biggest impact, do you?"

The boy did not dare to lie, nodded and replied, "Yes! ”

The man in white suddenly laughed, and his serious face revealed kindness from the glass mask, "That's right! The sense of smell is not as important as people think, and if you pinch your nose and eat, you will not tell whether you have eaten something fragrant or smelly, and you will not die because you have eaten something smelly. ”

He changed his words: "But if other sensory organs are lost, the result will be completely different. ”

Xia Chenghao suddenly remembered that when her sister was sick when she was a child, her father asked her to drink a black and bitter medicine, of course she refused, so her father asked her to pinch her nose and drink it.

From this point of view, it is to block some functions of her sense of taste and smell, so that she will not feel so uncomfortable.