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New study finds that human sperm swim like “playful otters”



A new study shows that we think everything we know about sperm movement is a lie: those persistent little swimmers do not swing to eggs like snakes, but swing back and forth like otters.

The discovery was published in the journal “Science Progress” on Friday. Scientists from the University of Bristol and the National Autonomous University of Mexico used a three-dimensional microscope to reconstruct the movement of the sperm’s tail.

The researchers’ findings run counter to the observations of Dutch scientist Antonie van Leeuwenhoek, often referred to as the father of microbiology, who was the first to record bacteria and red blood cells.

Van Leeuwenhoek also happens to have a unique uniqueness, that is, he studied his sperm with a microscope in 1

677, and a year later published a knowledgeable ejaculation assessment by the Royal Society of London. At that time, van Leeuwenhoek described his sperm cells as “animals” and observed that “while swimming…whip the sperm’s tail with a serpentine movement like an eel in a snake.”

One of the main scientists of this research, Hermes Gadliha of the University of Bristol Museum Laboratory, said that this “snake-like movement” idea is an illusion caused by observing sperm from above with a two-dimensional microscope. In fact, sperm sway in the water in a completely different way from eels, and their tails only rotate repeatedly on one side, like a spinning top.

“Human sperm rolls when swimming, just like a playful otter opening a bottle in the water. Their one-sided stroke will make it even and then swim forward,” Gadelha said, calling this type of corkscrew movement. “Swimming Technique”. Make up for their partiality. “

Gadelha added that the “otter-like rotation” of sperm seems unusual, but its internal complexity is reminiscent of planets. While the sperm head rotates, the sperm tail rotates around the swimming direction. In physics, this is called precession, just like when the orbits of the earth and Mars precess around the sun. ”

Alberto Darszon of the National Autonomous University of Mexico said that this discovery will “completely change our understanding of sperm motility and its impact on natural fertilization”, and may provide new ideas on how sperm swimming affects fertilization. Insights. He said that the survey results show that there are still many misunderstandings in the human body.

“Sperm are very cheeky little animals,” Gadlerha told CNN. “Our latest research using 3D microscopes shows that all of us are victims of sperm deception.”




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