- Trophocytes are cells involved in growth and development but do not contain symbiotic bacteria.
- Mycetocytes are the cells in cockroaches that house symbiotic bacteria. These bacteria help in the digestion of food in the cockroach.
- Oenocytes are involved in lipid metabolism and do not contain symbiotic bacteria.
- Urate cells are related to the excretion of nitrogenous waste and do not contain symbiotic bacteria.