Laboratory mice, to put it mildly, are generally mild-tempered, but to put it harshly, they are collectively stupid. I don’t know if this is due to inbreeding.

Recently, Zheng Tan often heard these mentioned in the ppt of Jiao's dad's genetics course, so when he saw the cage of white mice, Zheng Tan sighed in his heart that this was really similar to what Jiao's dad said. He really didn't learn from that.

There was fear in the eyes of several white mice. They might even have thought that the breeder was coming and was busy begging for food.

Father Jiao grabbed a white mouse from the cage and placed it on the table. He sighed to Zheng, "Watch it and don't let it run around."

Zheng Tan looked at the little white mouse who had no idea that he was about to face bad luck, and raised a paw to press the tail of the white mouse. The white mouse whose tail was pressed did not struggle too much, but showed that it wanted to go.

Forward crawling position.

Look, this is the difference between wild and domesticated rats. If the rats outside are held down by their tails, they will either try to break free or bite them in turn.

Dad Jiao put the cage containing the remaining four mice into an empty cardboard box so that they could not see what was happening outside.

"I don't know how you cats catch mice, or how to kill mice. I'm just telling you about our common methods."

With that said, Father Jiao took the little white mouse from Zheng Tan's paw.

"Let me tell you, in domestic laboratories, the cervical dissection method is basically used. This is also the least painful way to kill mice. If the technique is neat, it will not feel pain at all, which is also in line with what foreigners think.

Talking about animal welfare..."

Zheng Tan squatted aside and watched quietly. He knew that Dad Jiao had entered the teaching mode again. Sometimes at home, after Dad Jiao prepared to teach PPT, he would give a trial lecture himself, and the listener was Zheng Tan. So, Zheng Tan listened

When Dad Jiao said these four words, "I'm telling you," you knew he was in teaching mode again.

"Executed by cervical dissection, to put it bluntly, it means dislocating the cervical vertebrae, severing the spinal cord and brainstem. Use a tool or directly clamp the mouse's neck with one hand, grab its tail with the other hand, and pull it hard with both hands.

, that’s it. This is one of the methods. We also often use another method. You can also try it and see..."

While Dad Jiao was talking, he grabbed the tail of the white mouse with his left hand, and moved the thumb and index finger of his right hand to the neck of the white mouse and pressed down.

Then, there is no more.

Zheng Tan looked at the motionless white mouse on the table, then looked at Father Jiao with an "I'm optimistic about you" expression on his face, and tugged his ears.

"Look, the operation is actually very simple. It doesn't matter if you have never caught a mouse before. You just need to practice for a while. I have seen your speed when you beat Ah Huang. You will definitely have no problem catching up with the mouse."

The Ah Huang in Dad Jiao's mouth is a yellow tabby cat, and he is also one of the bad friends Zheng Tan met after turning into a cat. Different from the "sheriff", Ah Huang always does some ridiculous things, many of which are ridiculous.

When Zheng Tan looked at it, he wanted to go up and slap it, but Ah Huang didn't show up much recently, and he didn't know why.

Father Jiao caught another white mouse and asked Zheng Tan to try it on his own.

Zheng Tan killed the first one and pressed it three times before the poor little white mouse died completely.

When killing the second white mouse, Zheng Tan used too much force, but at least the white mouse died without feeling any pain. Zheng Tan felt more and more glad that he had become a cat instead of a mouse, and he was moving down the food chain pyramid.

Each step is to face one more level of hell.

"Cervical vertebra dislocation is very easy. The cervical vertebrae of mice are very fragile. You are mainly unskilled," Dad Jiao said instructing from the side, "Don't hesitate to take action. It is best to succeed in the first time, otherwise the mouse will be very painful."

, however, please note that the spinal cord and brain are pulled apart, rather than pulling the head off directly. This requires controlling the degree of force. It is necessary to break the cervical vertebrae without pulling the head off. Some of the students I taught before had problems with force.

It directly caused the pressure in the mouse's eyeball to be too high, and the eyeball actually burst."

Zheng Tan: "..."

Damn, it’s so scary!

Zheng Tan looked at Father Jiao's calm face when he said these words, and suddenly felt that there seemed to be a cold light in Father Jiao's eyes.

Zheng Tan recalled the topics they discussed when he went to a nightclub with a group of fair-weather friends. At that time, one person said: "Actually, the most powerful killers are not those who look vicious, nor those who wear big knife tattoos and pierce nose rings."

The perfect people are not those who wield knives and guns all day long to show how awesome they are, but those who look normal on the outside but can easily take lives in the next moment without changing their expressions."

Therefore, some senior experimenters say that from a certain perspective, he is somewhat similar to the killer's temperament.

The experimenter who enters the experimental state is really scary!

Zheng Tan then thought about it, maybe Associate Professor Jiao is the only person in the world who can teach his cat how to kill mice using the short neck method, right?

Zheng Tan obviously felt much better when killing the third and fourth mice. At least these two mice had a decent way to die compared to the previous two.

There were five white mice. Father Jiao killed one as a demonstration, and the other four were killed by Zheng Tan.

After cleaning up the five dead white mice, Father Jiao turned around and went to the back room. Soon he came out carrying a larger cage. There were still five white mice in it, but they were much larger.

"This is a rat. The white rat used in the laboratory is an albino variant of Rattus norvegicus. I still use the same method as before, but I need a little more strength, or a little more. I need to find the key points, control the strength, and succeed in one blow. What I need to do is

Demonstration?"

Zheng Tan shook his head.

"Good boy."

Zheng Tan: "..."

As Dad Jiao said, rats are a little more difficult, but after trying five rats, Zheng Tan became proficient.

"Do you still want to practice?" Dad Jiao asked.

Zheng Tan shook his head.

"Very good, we've just finished killing mice. Let me tell you..."

Zheng Tan tugged at his ears: "..." Here it comes again.

Although the mice have been killed, Dad Jiao's teaching state has obviously not completely exited.

"In our laboratory, in addition to the cervical dislocation method commonly used to kill rats and mice, there are also methods such as decapitation, bloodletting, beating, anesthesia, and poisonous gas, such as the marrow destruction method we use for frogs.

, a needle will do, um... Next week I will be leading a zoology anatomy class to dissect a bullfrog, and I will bring one back to demonstrate for you. Oh, and you should pay special attention to the fact that cats and dogs are executed in the laboratory.

Most of them are executed by air embolism." After a pause, Dad Jiao looked at Zheng Tan and said, "Do you understand this?"

Zheng Tan shook his head. His muscles were a little stiff, and the hair on his back and tail was still growing. He always felt that the surrounding temperature was very low.

"In layman's terms, this method is to inject air into the vein."

Zheng Tan trembled. He understood this. Even if he didn't have strong knowledge in this area, he still knew what would happen if he injected air into the veins.

"Air enters the blood circulation and reaches the lungs, blocking the pulmonary arteries and causing severe shock or death. For example, when you swim from deep water to a diving place, the pressure change causes the air in the lungs to expand, which in turn causes the lungs to over-inflate. If

If the excess gas is not removed or there is no time to remove the gas, it will be quite dangerous. This is how some passengers who fell into the water died in the Titanic."

As Dad Jiao said, he suddenly thought that telling a cat about Titanic would be useless, so he returned to the topic and concluded, "So, you must pay attention to yourself in the future, stay away from dangerous objects, and pay attention to self-rescue."

After practicing the technique of killing mice, tonight's goal has been achieved, and Zheng Tan has a clue in his heart. Although he is helpless about catching mice, since he is a cat now, only cats that catch mice can be recognized.

Ah Huang can catch that idiot, Zheng Tan believes that he can do the same.

When Zheng Tan returned to the Dong family compound, he saw a car parked in the open space with a familiar face wearing military badges.

So, that fat guy has also returned from visiting his relatives.

While Dad Jiao was parking his car in the parking shed, Zheng Tan jumped up to the balcony on the first floor and took a look inside.
Chapter completed!