The smallest known cell is Mycoplasma gallicepticum. This bacterium measures just 0.2–0.3 μm in size.
Mycoplasma are a genus of bacteria that lack cell walls. This allows them to be much smaller than other bacteria, which typically have rigid cell walls. Mycoplasmas are also known for their ability to adapt to a variety of environments and hosts.
Note: While the ostrich egg is considered the largest cell in terms of volume, it's important to remember that it's not a single-celled organism. It's a single cell, but it's part of a larger organism (the ostrich).
