A fascinating news about Human Sperm!
Always, the microbiology updates are very interesting and they always amuse us. This is a big news about human sperm; which they don’t swim the way we thought of. Let’s explore!
Sperm had the scientists fooled for a long time. Instead of floating directly by spinning their tails like propellers, human sperm lopsidedly flip their tails and roll to balance the movements, off-centre. More than 300 years earlier, microscopy founder Antonie van Leeuwenhoek defined sperm tails twirling in a symmetrical fashion, such as "that of a snake or an eel." However, the prevalent perception that sperm tails travel in a balanced manner does not capture what did happen in 3 dimensions.
Super fast 3 Dimensional microscopy of freely moving human sperm in the laboratory showed that the cells corkscrew as they pass, line with past studies. The sperm nearly seemed to dig into the flowing liquid, said by a mathematician at Bristol University in England; Hermes Gadêlha.
Gadêlha and colleagues broke down sperm tail movement into two components using automatic monitoring of swimming sperm and mathematical analysis of position data. Interestingly there was just there side of the cell wiggling. This is like swimming with only one side of the body, says Gadêlha. Such a lopsided stroke would by itself lead to circular swimming.
However a second part of tail movement rotates the sperm, balancing the lopsided strokes out. Above it, as has been traditionally mentioned, the sperm tail looks like it is beating symmetrically. But a 3D movement more complex prevents the sperm moving directly ahead.
The latest 3D measurements represent a big step forward in recognizing sperm movement, says Allan Pacey, a male genetic counselor at Sheffield University, England. However, further research is required to learn whether sperm migrate in the female reproductive tract the same way, where they have to deal with fluid motion and narrow passages to enter the egg. These work will inform diagnosis and human infertility care, Pacey says.