The ocean is of all thingsOrigin, which gave birth to the first life, has developed to this dayCountless speciesThey live in it, but everyone knows that the sea water is salty and cannot replenish the body water needed by the species, and even the more you drink, the thirstier you become.
The mysterious "sea world".
So, as the "indigenous" marine creatures in the ocean, how are they in the ocean?Replenish fresh waterWhat about it?
People are always curious about why the sea is salty, after all, the ocean occupies 71% of the earth's surface area, and it is not always thought that it is. Actually, to discuss".The culpritIt can only be said that it is the natural world.
First of all, the river is inDownstream areasIt flows through some salinized land, carrying a large amount of salt of its own and flowing into the seawater.
Salinization of the land.
And secondly, it isVolcanic eruptionsThe magma carries the salts from the ground to the seawater, and these salts accumulate to form seawater with high salt content.
The sea itself is like a huge one"Dead Lake"., the water in it is not exchanged, resulting in the inability to discharge the salt.
And in the oceanWater evaporatesAfter that, it is not possible to take away the salt, which either dissolves into the relatively low-salt sea or accumulates on the nearby beach and waits for the next dissolution to the sea.
Seawater evaporation cycle.
Over time, the salinity in the sea will only get higher and higher.
Sea creatures live in a salty environment and give themselves every day"Marinated to taste".
But as long as it's a living thing, it's neededFreshwater resourcesHumans have a variety of techniques to desalinate seawater, so what technology do marine fish have to replenish themselves to fresh water?
The so-calledBio SupplyTo put it simply, it is to eat other sea creatures to replenish itselfFresh water demand
The law of the sea: big fish eat small fish.
Since all living things are in the bodyYesDefinitelymoistureCarnivorous sea creatures only need to eat other sea creatures, and the body will naturally beGetFresh water supply.
For example, fish'sEyes, spinal cordand other parts, which contain a small amount of fresh water, even if it is meatyTracesmoisture.
At this time, some people may ask, these fresh water supplies alone are really enoughCarnivorousWhat are the survival needs of marine life?
To know,HumansThe daily requirement of fresh water is:About 8 cupsIt's the same for creatures, even if they're small, they need at least 2 cups or half a cup.
However, marine life is not like land life, they don't need itPerspirationregulates the body, in other words, the vast majority of sea creatures, in vivoWater lossIt's not big, and they don't need much fresh water.
Especially for someSmall to medium-sized body typeFor carnivorous sea creatures, a certain amount of food brings more than enough water to their bodies.
Moreover, these marine creatures, which rely on organisms for water supply, have a special structure in their bodies that can effectively keep their prey insideFresh waterUse it for yourself.
Even with trace amounts of water, these marine organisms that depend on biological supplies can be used effectively.
There are thousands of creatures in the ocean, and there are many moreNot adaptingThis type of resupply, for example, requires more fresh water from large sea creatures, alonePreyIt is definitely not enough for its own fresh water needs.
orNon-carnivorousMarine creatures, they do not eat other marine organisms, naturally there is no biological supply.
At this time, the sea creatures sacrificed themselves to purify the seawater"Magic weapon".
Among them, the turtle is relied onLacrimal glandsto drain the salt you have eaten.
Turtle: I have special skills.
It's a little hard to believe that turtle tears belongPhysiological phenomenaHow can it have the function of purifying water?
The experts also conducted an experiment in which a large turtle was injected with a quarter of its body weight of seawater.
Soon after, observers saw that the turtleTearsThe tears were tested and found to be more than half as high as the salt content of the injected seawater.
Experts also extracted the purified water from the turtle's body and found that the salt content of this water has been reduced by more than 90%, basically reaching the level of human consumption.
Say hello to the camera.
Amazing through this groupData comparisonIt can be found that the turtle itself is a natural seawater purification device, and they are able to use all the seawater.
With this purification function in hand, the turtle naturally does not have to worry about the lack of fresh water in the ocean.
It is worth mentioning that many of the oceansReptilesThey all use this lacrimal gland to achieve the purpose of replenishment, which is really convenient and practical.
It is the most abundant of marine creaturesFishand how they pass"Purification device".What about those who come to draw fresh water?
Actually, fish are mainly through a species called"Chlorine cells".something to achieve self-replenishment.
Clownfish in brilliant colors.
"Chlorine cells" are found in the gills of fish, which in turn are fish'sRespiratory organsFreshwater fish draw oxygen from the water source through their gills and breathe.
In the same way, it is through the gills that marine fish use "chlorine cells" to filter out salt while breathing, so that they can get enough fresh water.
Some fish are not at ease with their "chlorine cells", and after purification, they will use their ownKidneysThe purified seawater is purified a second time before it is finally absorbed into the body.
Whales rely on the powerful function of their kidneys to keep the seawater in their bodiesPurification, which is then supplied to the cells of the body.
As we all know, whales eat both"Swallow dates".A large piece of seawater is swallowed into the stomach, and most of it is discharged through the "spout".
But there is always in the bodyResidueAt this time, the function of the kidneys is reflected.
In addition, whalesBody typeWith such a large amount, a single water source is certainly not enough, they also need to be replenished by a large amount of prey that they eat.
Double resupplyUnder the effect, it ensures that they can live well in the ocean.
Whale: It's a very comfortable day.
Finally, there is a comparisonCuriosityMost people can't stand it after listening to it.
The so-called urea replenishment is not to drink your own urine, but to use your ownUrineto bring the seawaterConversionsfor fresh water.
Urine is excreted by living organismsInorganicsHow can it still be a freshwater "conversion device"? Next, I will explain it in detail for you.
Most biological excretion is the excretion of urine from the body, but it takes placeUrea supplementationof different marine life, for exampleSharks
While excreting their own urine, the shark retains it in the body with a special mucous membrane, which penetrates almost all over the shark's body, and the whole body is wrapped in urea, and its flesh also has a "special taste".
This urea exists to allow the osmotic pressure of the shark's body fluids to be higher than that of seawaterOsmotic pressure, so that when the sea water comes into contact with the shark's body, it forms a natural onePurify the barrier
With this barrier, sharks naturally do not need to drink water to replenish, but only need to infiltrate their bodies every daySea water, you can get enough water.
At this time, curious viewers will inevitably have questions, this way to purify the seawater, will not beHold onIs it? After all, it is inevitable that there will be a purification of seawater all the timeExcessive intakerisk.
There is no need to worry about this, because the shark barrier is directly connected to the cells of the body after contact with the seawaterConnected, eliminating the "middleman".
X-cell CG does not reach the stomach and so onRelated sites, the so-called death is impossible to talk about.
Once the cells are saturated, they no longer absorb water, as they areSpongesIn general, after reaching the upper limit of self-absorption, you will not consume water.
The most critical thing is that this barrier takes the purification of seawaterEfficiencyIt's not high, and even if the shark is in the process of replenishing all day, it will not overdose.
It can be seen that the subtlety of the shark's own "purification device".
Humans have to sigh that in the face of the living environment, speciesEvolutionIt is precisely because of this tendency to evolveGenesexists, and species in nature can survive for tens of thousands of years.