A paramecium eats through a mouth-like opening called a cytostome. This structure is a feeding groove found at the cell's surface in protozoans. A paramecium uses its cilia, which are hair-like projection, for movement and to push food into the cytostome, and the food goes down a tube-like structure called a gullet.
The paramecium eats foods that include algae, bacteria and other protozoa or protists. In turn, the paramecium is preyed upon by other protists like amoebas, flatworms and water fleas.
This organism is uni-cellular and reproduces through binary fission, or it splits in half. The inside of the paramecium consists of the fluid called protoplasm, nucleus and vacuoles. It also inhabits different water sources like ponds and rivers.