Sperm compared with a corkscrew and otter

Human sperm cells during the movement of the planets rotate in one direction like a corkscrew or frolicking in the water the otter, not undesirous (“wags tail”), as many other cells with flagella, reported in Science Advances. Figured it out thanks to high-speed video of male germ cells under the microscope. Information about how to actually move the sperm may be useful in the treatment of infertility.

Humans, like many other animals and some plants, male sex cells (sperm) are mobile and for fertilization needs to reach the stationary female gametes. Usually, the sperm swim a certain distance in the liquid water-based. If their mobility is somehow breached, the merger of gametes will not occur and the offspring will not appear. Therefore, it is important to know how to move the sperm in the event of violations to help them.

Antoni van Leeuwenhoek, describing in 1677 male sex cells, and noted that they move in a fluid, curving the tail (flagellum) like a snake or eel Flex body. For reasons of Leeuwenhoek, the movement of the sperm symmetric, and so often still do. However, it is known that the sheath of the flagellum asymmetrical, and some other facts, available data on the swimming of the sperm can not explain. It is known that asymmetric waves create the tails of the male gametes from mice and chlamydomonad, but check it for the human sperm on their movement in two-dimensional space, as did Leeuwenhoek, impossible.

Scientists from the UK and Mexico under the leadership of Gabriel Corkidi (Gabriel Corkidi) from the National Autonomous University of Mexico captured the movement of the sperm of healthy men high-speed camera (55 thousand frames per second). Piezoelectric device allowed continuously to move quickly sample and was able to make several projections.

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