Keep in mind that properly vented ventilation fans also suck a lot of heated air out of your house. A remedy is to install a heat-exchange ventilator fan. These fans use warm, outgoing air to heat cooler, incoming replacement air.
The size of a typical bacterial cell is 0.5-5.0 micrometers, a average human cell is 10 micrometers. 8 people found this useful.
Best Answer: Bacteria are single cell microscopic organisms & are everywhere Parasites are a organisms that feed off others for their own benefit. Viruses are a microscopic particles that can infect the cells of a biological organism.Basically they can all make you sick in one way or another.The main difference is that bacteria and viruses are not considered true life forms while parasites are.iruses are a microscopic particles that can infect the cells of a biological organism. Basically they can all make you sick in one way or another. The main difference is that bacteria and viruses are not considered true life forms while parasites are.