Bioreactors are systems used to cultivate cells, microorganisms, or tissues for various purposes such as production of biopharmaceuticals, industrial enzymes, or study of biological processes. They provide a controlled environment for biological growth, including factors such as temperature, pH, oxygen levels, and nutrient supply. Bioreactors can be classified based on the type of growth, mode of agitation, and scale of operation, among others. They play a crucial role in the field of biotechnology and are essential for producing large quantities of biological products in a controlled and efficient manner. WPI experts can discuss how bioreactors impact everything from the study of cancers to yeast to the use of plant-based substances to treat diseases like malaria.