Magic Tower Starry Sky

?Because the Midi version of the microscope is based on magic, unlike Earth's, it's not a big deal for a microscope to observe multiple objects at the same time. Even this mysterious version can do the same thing as the dissecting microscope on the earth, making the observed samples appear three-dimensional.

But Fen didn't intend to use such a complicated operation. The second sample she was going to present was the leaves that she ordered the apprentices to pluck. With the same simple and neat movements, she skillfully took out the thin film of the lower epidermis, and put it on the stage after the same treatment.

With a sample of animals and a sample of plants, Finn explained the characteristics of each part of the cells and the differences between animals and plants. In order to allow everyone to understand the cells more clearly, she also took epidermis, blood, etc. from someone, and made an introduction. It makes someone feel like being treated as a guinea pig, and this guinea pig has to help manipulate the screen in class.

There are only one type of animal and plant cells, of course it is impossible to delay for too long. After all, the academy in Lost Earth is not as pressured by exams as the schools on Earth, so the teacher has to say in class from time to time: 'This is the key point, and the exam will come out later' or something like that.

Teaching in the lost ground is more like the concept of briefing on the earth, focusing on the key points, and then outputting a lot of information. This is someone's new experience after taking a few math courses.

In particular, the people who come to this advanced course are all magicians, and they are still solid, not the kind of apprentices who have just received enlightenment. And for those who can become official magicians, their memory and comprehension skills are no longer a problem. To put it simply, it is the feeling of teaching a master. It's no wonder that when teaching in the holy city, if one is not good, he will be disgraced and kicked out.

The definition of good teaching is also very simple. Either the new content is shocking or subversive enough, or the new content is too much for others to receive in time. If you can do these two points, you will be a good teacher in the mouth of this group of bullies.

So after talking about the basic differences and types of animal and plant cells, Fen directly introduced the cells of all parts of the human body. Including the difference and use of each cell, the use of the organs composed of cells, and the use of the system in the body composed of these organs.

One thing that is gratifying is that the following introductions all use pre-prepared pictures instead of collecting them on the spot. Someone thus escaped the fate of being dismembered.

However, although these new knowledge was novel, it failed to touch the calm hearts of these old magicians. Everyone's study in class was calm and silent, copying notes quietly. For such a situation, of course, someone can guess it from the beginning. After all, the masters who are lost in the land all follow the practical route. It's too purely academic, and it's hard not to make people wonder "what's the use of learning this".

So with thirty minutes left in the first life lesson, Lin's proposed syllabus takes a small turn. Fern's ability to keep track of time was so precise, too, that even if she didn't look at her pocket watch—the magic gold pocket watch someone made long ago, which is still one of the lich's trophies and can't get it back, woohoo—or the clock, she still One hour and thirty minutes after class starts, say:

"The above is the introduction of cells in various parts of the human body. Including human beings, as long as you can see the creatures on the mysterious ground, they can be classified as multicellular organisms, that is, each creature is composed of thousands of cells with different functions. It is composed of cells. Then the question arises again, do single-celled organisms exist? It is the kind of organisms that have the ability to move and proliferate with a single cell."

Also without waiting for anyone to answer, Fern asked again: "Who is there with water?"

Although no one answered, none of the mages opened their mouths to chant incantations, and they also easily used a ring of apprentice-level magic-water collection, and condensed into water **** in the air.

"Sorry, folks, I didn't make it clear. What I need is potable spring or well water, not magically created water."

The water polo in the air dissipated without a sound. One of the magicians picked up a sheepskin water bag and said, "This is the spring water from the Fairy Spring in the forest. Can this water be used?"

The spring water of the Fairy Spring, one of the specialties of the holy city of Estali, is a high-priced item. It is said that long-term drinking will help magicians increase the speed of accumulating power. But people who are not suitable, or people who drink too much, will appear resistance symptoms.

"Yes, this is really great." Fern took out another empty petri dish, came to the magician who spoke, and said, "Please pour some on this glass dish, it will be fine."

Although the Spring of Spirits was expensive, the volume of the small container seemed to be less than one mouthful, and the magician with the spring water didn't care about it, and directly filled it half full.

"Okay, everyone, this is the spring water of the Fairy Spring. Let's see what's in here."

Fen, who returned to the podium, did not do any treatment to the water in the petri dish, and put it directly on the stage of the microscope. The next operation is to be carried out by herself, not by Lin as an assistant. The operation is not just a simple microscopic magnification, but opens the analysis function and comparison of the program. Looking at the constantly updated data on the water mirror screen, Fen laughed and said, "Hehe, the underwater world is really exciting."

The analysis speed is very fast, and it will be completed in a short while. Fern said: "In the volume of water in the petri dish between about three and four milliliters, some different types of microorganisms were detected, most of which were not in large quantities. However, the most was this,—"

At this time, a large number of long rod-shaped bacteria with rounded ends and no spores were displayed on the water mirror screen.

"──Escherichia coli, it mainly parasitizes in the large intestine of animals. Some strains are beneficial bacteria, which can produce substances needed by the human body and prevent the growth of other pathogenic bacteria. But some strains can cause food contamination, so that eating Those who suffer from food poisoning symptoms. The common manifestations are vomiting, abdominal pain and diarrhea. Except for the intestinal tract of organisms, they mostly exist in the environment contaminated by feces."

As soon as Fern's speech came out, everyone was in an uproar.

What a joke! This is the fountain of elves, one of the most popular items among magicians in the holy city, it can be used as a material for making props, or it can be drunk directly. The person who provided the Fountain of Spirits was not an unknown young man, but a well-known veteran magician, so he couldn't come up with fake products, nor would he intentionally deceive people.

The water in the glass dish was poured out of the sheepskin bag in front of everyone. Although it was checked on her strange machine by the Lich, under the watchful eyes of everyone, there was no chance of tampering with it.

So what is it about saying that there are things in the water that can poison people? It even has something to do with feces!

In the class where only Fern had been acting, someone finally spoke up. The first question is: "Your Excellency Fanny, did you make a mistake? How could there be something poisonous in the Fairy Spring. I have never heard of anyone dying from drinking the Fairy Spring."

"What do you think is 'poison'? Something that will kill you if you simply eat it? Let me introduce another concept here, the lethal dose. Everything is toxic, but the question is how much you have to eat before you die. Some Things are highly poisonous, and even a little bit of powder, if it touches the mouth, will kill people. But there are some things that are not like this, like chronic poisons, which will continue to accumulate in the body. When the accumulated amount reaches a certain level, It will cause disease in the human body and cause death. Although the operating mechanism of the disease is not exactly the same as that of the poison, generally speaking, there are still places for reference.”

"What do you mean?"

"These single-celled organisms, I call them bacteria. Bacteria are ubiquitous, but after ingestion into the human body, there may be more or less. If the amount is small, the body's immune system will automatically eliminate these pathogenic bacteria. But if the amount When there is too much time to get rid of them, they will induce the symptoms of the human body, which is the so-called illness. As for yourselves, has no one experienced physical discomfort because of drinking the fountain of elves? Especially the characteristic is the one I just mentioned similar."

"This..." The magician who asked the question was at a loss for words. Because the symptoms mentioned by Fen just now are actually the resistance symptoms of those who are not suitable. In the end, he could only barely defend himself by saying, "Is this all affiliation theory?"

Fern wasn't offended by questions of mistrust and suspicious looks from others. Instead, he nodded towards Lin and began to show pictures one by one.

The first picture is a semi-abandoned village with lying dead bodies everywhere. The very few who seemed to be alive also looked miserable. The deceased did not die from the disaster of war or monsters. There were abscesses of different sizes on his face and body, and the ends of his limbs were black.

At a glance, those present recognized the disease as the notorious Black Death—the plague.

"This is the record I left when I heard about a plague somewhere during my travels and went to observe it. Most people think that this infectious disease is spread by rats. In fact, there are two infectious agents, except rats. , and fleas, but they are only used as a bridge for disease transmission~www.wuxiaspot.com~ The main pathogen is──”

Lin changed the picture in due course.

"─ Yersinia pestis is very similar to the Escherichia coli shown before, but the bacteria are longer and have segments, which belong to diplococcus. The cause is that after the drought, the decline and excessive growth of plants caused a large number of plants to grow. Herbivores and animals As a result, insects proliferate in large numbers, and rats multiply because of more food, exceeding the number that can be controlled by the supplementary feeders for rats, and then let the disaster expand. The way to prevent it is to prevent rats, eradicate rats and eliminate fleas, and do not approach infected animals People, to avoid continuing to infect germs.──”

The next picture is another dilapidated village. The same dead people, but unlike the villages that died of the plague, the faces of the dead here were haggard, as if they were dry.

"──This is another village, infected with a type of plague, which I call cholera. The symptoms of the infected are mainly diarrhea, dehydration, vomiting, muscle convulsions, etc., which in turn lead to sunken eye sockets, clammy skin and Lack of flexibility. The main mode of transmission is through water or food contaminated by the feces of the patient. The method of prevention is simply to isolate the sick person and drink clean water. The main pathogen is-"

Another picture.

"─Vibrio cholerae. The bacterium is short and small, but it has a single flagella, pili, and some have capsules. There is no good treatment method. The only thing to pay attention to is to avoid dehydration of the patient. Therefore, we can only continue to replenish water and wait for the patient. Get through this by yourself."

After that, Finn went on to demonstrate several plague-level infectious diseases, as well as the bacteria of the main focus. Now, the masters who have changed the bottom can't sit still!