Fact 1: Lymphocytes are the key cells involved in the immune response.

Fact 2: Blymphocytes produce antibodies .

Given the two facts above, answer the question "The cells that produce antibodies are key in what system?" with the following options: 
- health
 - T cells
 - vision
 - humans
 - macrophages
 - B cells
 - disease
 - immune


 

        immune 