Illustrate design of a bioreactor. Highlight difference between a flask in your laboratory and a bioreactor which allows cells to grow in a continuous culture system. 

(A) Simple stirred-tank bioreactor: 
(B) Sparged stirred-tank bioreactor through which sterile air bubbles are sparged 
Structure of Bioreactor: 
$?$ It Is a cylindrical structure with a curved base. 
$?$ A stirrer is present for even mixing and oxygen availability throughout the reactor. 
$?$ There is an agitator system, an oxygen delivery system, a foam control system, a temperature control system, etc. 
$?$ There is a sampling port through which small volumes of culture can be taken out periodically. 
A flask in a laboratory cannot be used for producing  products on a large scale. Unlike a bioreactor; a flask cannot be used to grow culture continuously.