Lead:
The tuna, a "swimming machine" in the ocean, can travel at speeds of up to 80 kilometers per hour.
This speed is beyond the limits of humans, but for tuna, their speed is not enough for them, because once they are no longer moving, they will continue to inhale water, eventually causing suffocation.
In order to adapt to this high-speed sports life, tuna will have extraordinary adaptability, as well as strong motor ability.
So how powerful is tuna's athletic function, and why is it so fast?
Why is tuna so fast?
In the animal kingdom, tuna can easily crush any other animal and travel at speeds of up to 80 kilometers per hour, which is more than twice the human limit.
Humans can only increase their speed with the help of power machines, while tuna runs on their own.
When tuna swim, they need wing-like pectoral fins to help them move through the water, but how do these wings help?
People have always had doubts about the speed of tuna, and it is not until the principle of rocket launch has solved the confusion that people gradually understand the speed of tuna.
When a rocket is launched, the flame at the tail will push it forward, and when the flame is ejected, there is no power at all, but it is not.
Theoretically speaking, after the rocket is launched, because there is no air in outer space, the rocket can fly forward all the time, and if it does not reach its destination, then it will always remain in this state, which is why it can fly very far.
But on Earth, the air will have a certain resistance to the rocket, which causes the rocket to produce air resistance, so because there is no force to push it forward, the rocket will gradually slow down and fall.
The speed of the tuna is the same as that of a rocket, when it swims, only the front fin is resisted by the water, and the back half of its body is not resisted, so the body will want to run forward, but because they are integral, they do not have the ability to run freely, so they can only make the pectoral fins resist the upper half, so that they can generate a thrust upward, and finally push the tuna forward.
When the front of the fin is the same as the resistance behind the fin, the tuna will no longer be pushed forward, so it will retract the pectoral fin, so that the pectoral fin can produce thrust, and so on and so on, the tuna can keep running forward.
And tuna can travel at speeds of up to 80 kilometers, and there is another ability that is the same as that of human beings in high-speed movement, and that is endurance.
Among the sprinters, there is a competition called the 100-meter sprint, which requires athletes to start at the starting pistol on a standard track and then speed forward on the track until they have completed the standard 100-meter run.
On the standard 100-meter track, the men's and women's lengths correspond to 100 and 90 meters respectively, and it is at this length that the human limit of speed is born: 9.58 seconds for the men's and 10.49 seconds for the women.
In every 100-meter race, people can see the fast running posture of the athletes, which is also because the athletes are very energetic, so in the short-distance movement, human beings can play an extraordinary role, but ordinary people in the 100 meters, it is impossible to achieve such a speed.
And then look at tuna, how much speed they have at 100 meters, and in fact, tuna don't have the energy of humans, so they can travel slower than humans in short distances, reaching 50 kilometers per hour.
But in terms of endurance, tuna has surpassed the ability of humans to exert force for a long time, humans usually feel great fatigue when running at 100 meters, if at 200 meters, it will gradually appear in a state of prostration, so can tuna last hundreds of kilometers?
Tuna can gallop at a very fast speed, and why can tuna run so fast, in order to solve the doubt, scientists have done a series of tests on the physical fitness of tuna.
Tuna is 80 kilometers per hour, because if you stop, you will die.
In order to minimize the impact on the life of the tuna and its natural state, scientists equipped the tuna with experimental equipment such as speedometers, thermometers, depth gauges, blind fins, etc., and then put the tuna into the water for observation.
When the tuna is swimming, scientists can observe the tuna in real time in the process of swimming, their speed and blood pressure and heart rate during the swimming and other physical indicators, and finally the scientists came to the conclusion: when the tuna is swimming, the speed of their swimming is inversely proportional to the frequency of the wings, that is, the slower the tuna wings are reciprocating, the faster the tuna.
After having a certain understanding of the mystery of tuna, this group of tuna, which has never been in contact with humans, after being released, they are like swimming in the boundless sea without knowing anything, and have never been affected by humans.
And there is an infinite space in the sea, so the speed and swimming ability of the tuna can be used to the fullest, but if the tuna is moved to the narrow pool, it is easy for the tuna to feel stuffy and empty, and they will continue to swim in the narrow pool, but they can never swim out.
When the tuna swims, the way it swims is a symmetrical and leisurely swim, rather than an unhurried swim, so can the tuna swim because their bodies are well suited to swimming?
The body of the tuna is very suitable for the environment in which they are located, the body of the tuna is very long, the front half of the body is large, the back half of the body is small, and the tail is a triangle, the powerful convergence can push the water away, and of course, the movement of the tuna is also very strong.
The muscles of the tuna are very well developed and hidden deep in the surface of the body, the skin on the surface of the body is very smooth, and when the tuna swims, it can reduce resistance and swim very fast.
The heart and respiratory organs of tuna are also very powerful, their hearts can quickly send blood to all corners of the body, and the blood of tuna is different from ordinary fish and humans, they have a large amount of hemoglobin in their blood, which can allow them to obtain a lot of oxygen, and they also have dragonflies and watery respiratory organs, which can greatly increase their endurance.
Epilogue:
With a speed of 80 kilometers per hour, the tuna comes from good physical fitness, as well as a very strong athletic ability.
When the tuna is running, its muscles are always strong, its blood is always flowing in its body, and the tuna can resist the resistance brought by the water.
And tuna also have a strong stamina, when all the switches on their body are turned off, they can also last for more than ten hours, and they have a very strong stamina.