The human middle ear is an important hearing organ, and there is sufficient embryonic and fossil evidence to prove that the human middle ear evolved from the blowholes of fish, and how the blowholes of fish came from is A problem that has plagued academia for a long time. Recently, scientists from the Chinese Academy of Sciences and scientists from the United Kingdom and Sweden completed an in-depth study of ancient fish fossils more than 400 million years ago, confirming that fish blowholes evolved from the first pair of gills, which is also the first time the scientific community has revealed through fossil evidence. , The human middle ear first originated from the gills used by fish to breathe. It is reported that since 2002, the research team has carried out field work in the Zhejiang area, and found one of the most primitive true armored fish fossils here, and later named it Shuyu. After that, the research team took 5 years to complete the three-dimensional reconstruction of seven fossil skulls. Through the in-depth study of the three-dimensional virtual model of the brain and skull of Drosophila, the research team found that the so-called interbranchial ridge of the armored fish is actually the dorsal part of the branchial arch. Through multiple lines of evidence, scientists have determined that a gill sac in the armored fish is an unregressed gill located between the jaw arch and the lingual arch, rather than a blowhole. On this basis, the research team reviewed the evolution of blowholes from jawless to tetrapods, and established the .
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