Protozoans are eukaryotic cells.
The cell illustrated is of the protozoan known as Paramecium caudatum . Study illustrations of eukaryotic cells on the internet. Inside the cell is a fluid called the cytoplasm . A nucleus is inside the cell, often but not always centrally located, and contains the genetic programming information for the cell, that is the DNA . Inside the nucleus is nucleoplasm , a fluid analogous to cytoplasm but located in the nucleus.