What type of protozoan is characterized by being covered with tiny hair-like structures for movement and sensing?

Ciliates are a specific group of protozoans that are distinguished by their unique composition of tiny, hair-like structures called cilia. These cilia are not only essential for locomotion, allowing the organisms to move through their aquatic environments effectively, but they also play a significant role in sensing their surroundings and capturing food particles. The rhythmic beating of the cilia enables ciliates to propel themselves and create water currents that help in the intake of nutrients.

While "protozoan" and "protist" are broader classifications that encompass various types of microorganisms, they do not specify the unique features associated with ciliates. Meanwhile, "pseudopod" refers to a mode of movement and feeding employed by certain protozoans (amoebas), which is different from the ciliary movement characterizing ciliates. The presence of cilia is a defining and notable characteristic that sets ciliates apart from other protozoans.