Answer
An open system is a system that exchanges mass and energy with its surroundings or environment.
Step-by-step explanation:
IN BIOLOGY,
A cell works as an open system i.e it takes in substances needed for its metabolic activities through its cell membrane. Then it performs the metabolic processes assigned to it. Products and by-products are formed in metabolism. Cell either utilizes the products or transports them to other cells. The by-products are either stored or are excreted out of cell.