A few days ago, a "Chinese scientists revealed for the first time that the human middle ear was once the gills used by fish to breathe."
We all know that the reason why people have sensitive hearing is because of the secret of the middle ear that humans have.
According to the theory of evolution , humans evolved from the ocean to land. Research has proven that the human middle ear evolved from the blowholes of fish.
Since it sprays water, where do the blowholes come from?
my country's Chinese Academy of Sciences , together with academicians from China, Britain, and Sweden ( Sweden ), is the first author in "Frontiers of Ecology and Evolution" " published the latest research results on the origin of vertebrate blowholes, revealing for the first time that the human middle ear was once the gills used by fish to breathe.
According to the research team, in order to achieve this scientific research, in the past 20 years, the research team has successively found the 400-year-old Auropod fish in Changxing, Zhejiang, and Qujing, Yunnan. and found complete preservation of gill silk prints in the first gill pouch The wide soft-shell turtle fossil provides definite anatomical and fossil evidence for the origin of vertebrate blowholes from fish gills. "
No wonder it is said that " enters the left ear and comes out of the right ear". This is the truth. There is still a scientific reason left by the ancestors. It can be said that the ancients do not deceive me!
Then the gills of fish enter the human body. How did the ears evolve step by step?
Today's fish only have gills, but no lungs, which are assisted by the gill cover. When water is sucked in from the mouth and flows through the gills, the gill cover opens and the mouth closes, and the water flows out from the gills. , the two alternately open and close, forming a continuous one-way water circulation in the gills, so they must rely on water flow through the gills to obtain oxygen from the water. This process is different in bony fish and cartilaginous fish . .
Early bony fishes could breathe air from blowholes, which was a prerequisite for evolving into land creatures.
In the long process of evolution, the passage between the nasal cavity and the oral cavity was opened, thus providing a way for fish to land. Lung breathing further laid the foundation.
The nostrils became the main respiratory organs. The blowholes that lost their breathing function gradually evolved into the human middle ear cavity, and finally entered the human middle ear.
Life in nature is really amazing. It’s amazing that over hundreds of millions of years, marine organisms have slowly evolved into terrestrial organisms, and in order to adapt to the new environment, they have continuously improved their organs.
From single cells to multi-cell organisms, from fish to humans, all kinds of organisms have different forms. Species, consultation and digging can find some clues that have something in common with
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