Author: Undersea Lava

Su Ji looked at the two long slits on her face. To be more precise, they should be called gill slits. She was pleasantly surprised but also a little worried. The surprise was naturally because new organs had grown, and new organs indicated new abilities.

Worrying is not something anyone would worry about if two slits suddenly appeared on their face.

Su Ji turned her head to the left and gently opened the gill slit on her right face with both hands. It was neither comfortable nor painful. It felt like opening her mouth, nothing more.

He tentatively put his fingers in, wanting to feel the internal structure. When he thought about how people usually kill fish and use their hands to pull out the red organs from the fish's gills, it's not like the nostrils can be dug out casually, so in the end he didn't dare to put it in.

No matter what, growing gills means that he will have the ability to breathe underwater from now on.

What can you do if you have the ability to breathe underwater?

Being a lifeguard is overkill.

It feels good to hunt for treasures under the sea. Even if many treasures have been fished out, there must be many treasures that have not been fished out. As long as you just fish out a few things, you will become prosperous from then on.

If you can't, you can still fish for seafood, such as big crabs and lobsters.

Just worry about those ferocious beasts in the sea... Actually, you don’t need to worry so much. Mammals in the sea are generally very friendly to humans, and they will even rescue humans. In fact, sharks including great white sharks do not like to attack humans. That is why they attack humans.

They treat humans as seals.

Su Ji couldn't wait to test whether he had the ability to breathe underwater.

He returned to the pool, jumped into the deep water, swam and swam, swimming close to the bottom, walking and punching under the water, cruising around the pool, swimming in synchronized patterns... Why was there still no oxygen even though he had gills?

Woolen cloth.

Su Ji frowned. He wanted to know the key reason, which was that he did have gills, but he had never used them and didn't know how to use them.

He swam to the edge of the pool and lay on the edge of the pool playing with his mobile phone. He wanted to figure out how to use the gills.

Su Ji Baidu studied the structure and use of fish gills.

Gills are the respiratory organs of fish. The outermost part is the gill cover, and the cavity inside the gill cover is called the gill cavity.

When you lift the gill cover, you can see that there are four gills on each side of the throat. Each gill is divided into two rows of gill lamellae. Each row of gill lamellae is composed of many gill filaments, and many small gills grow on both sides of each gill filament.

Small piece.

When the fish is in the water, each gill lamellae, gill filaments, and gill lamellae are fully opened, which expands the contact area between the gills and the water and increases the opportunity to absorb dissolved oxygen in the water. There are capillaries in the gill lamellae, and the epidermis here

It is very thin. When blood flows through here, gas exchange is completed, oxygen is absorbed, and carbon dioxide is sent away.

Due to the alternate opening and closing of the mouth and gill cover, water can continuously enter the mouth from the mouth, reach the gill cavity through the pharynx, contact the gill filaments, and then be discharged to the outside through the gill pores. The respiration of fish is in this process.

Completed.

Some of these sharks will die if they remain motionless because they have no backup system for gill-guided breathing. They must constantly swim with their mouths open, sucking in water through their half-open mouths, and then forcing the seawater to flow in through the gill slits.

, thereby performing gas exchange.

Su Ji knows what to do now.

After he enters the water, he cannot close his mouth and hold his breath. He must drink water and then let the water pass through the gills to discharge it, so as to achieve the effect of underwater breathing.

Does this mean he needs to drink the bath water?

Su Ji looked at the calm water surface of the swimming pool and hesitated for a moment, but it was only for a few seconds. After all, the water in this swimming pool was clean. She plunged into the water with all her strength, took a deep breath of water, and then... The problem now is how to make this water

Expelled through gills.

Definitely not drinking the water.

He closed his eyes, pinched his nose, and tried to squeeze the water toward his cheeks. This method was very effective. He just used this method to let the water flow behind his gills, but he didn't feel anything special.

Maybe it's because his lung capacity is huge now, and he can even store oxygen in his blood. The little oxygen he just breathed underwater was not noticeable at all.

Su Ji began to toss in the water, tossing and turning until there was no oxygen. She took a deep breath of water, then squeezed the water to her cheeks, letting the water flow through her gills... She felt a little bit, but it was not enough. Her income was not enough to cover her expenses. It would be enough to take one breath like this.

Not enough to consume.

Su Ji surfaced, gasping for air, swam to the edge of the pool again, and picked up her phone again.

He has many ideas and now needs data to support them.

The oxygen content in the air is higher than that in water, because although oxygen is soluble in water, it is only slightly soluble in water.

Let’s look at the source of oxygen in the water.

On the one hand, it is supplemented by the atmosphere. Under the action of atmospheric pressure, oxygen in the air penetrates into the water. Even when the oxygen concentration in the water reaches saturation, the water will release excess oxygen into the air. The intensity of the light, the air pressure

The size and temperature will all affect the amount of dissolved oxygen in the water.

The amount of dissolved oxygen in water is constantly changing.

On the other hand, the photosynthesis of plants in the water due to sunlight allows the plants to absorb carbon dioxide and release oxygen.

There are no aquatic plants in this swimming pool, and almost all oxygen comes from atmospheric pressure, so there may be less oxygen than normal water sources.

Then the lungs of mammals and the gills of fish both evolved to adapt to their own living environment. There is no way to compare which one is superior. But in terms of gas exchange efficiency and utilization, mammalian lungs

It has a large number of alveoli and other structures, which are much higher than the gills of fish.

Seeing this, Su Ji nodded.

If not, even if he can breathe in water, since breathing in water cannot achieve the efficiency of normal breathing, he must work harder if he wants to truly achieve the effect of free movement in water.

Su Ji soaked in the swimming pool all afternoon, constantly practicing water breathing, trying to achieve the goal of not having to absorb water as soon as possible, and then squeezing the water to her cheeks so that the water can pass through the gills, so that she can breathe freely underwater, and then the next goal is to absorb water.

It can even absorb water and drain water at the same time, so as to obtain a large amount of oxygen in one breath.

In the evening, he also soaked in the swimming pool, practiced until late at night, had a late-night snack, and fell asleep as soon as he went to bed.

On Friday night, Su Ji received another WeChat message from Xia Hooyue.

Xia Houyue: I'll go there tomorrow morning.

Su Ji:Okay.

By Saturday, Su Ji had completely forgotten about Xia Hooyue's coming. He became more and more proficient in breathing underwater. As long as he didn't swim vigorously all the time, he could maintain his diving state. Finally, he surfaced because he was too bored and was ready to play.

Take a break from your phone.

have to.

WeChat has seven unread messages.

Then six missed calls.

All from Xia Houyue.
Chapter completed!