The fastest cell in the world is a human embryonic mesenchymal stem cell, which has been recorded to migrate at a speed of 5.2 μm/min. However, this is a relatively slow speed compared to the possible speed of microbial swimming.
While this stem cell holds the record for fastest crawling speed, the fastest cell overall is likely a microbe. Microbial swimming is significantly faster than crawling, making it difficult to accurately measure and compare.
