So beelymphocytes are part of the humoral immunity. When they approach foreign antigens floating around in our tissue, they bind to them via special receptors and then they undergo receptive mediated endocytosis and that takes in that antigen into the cell. And once that happens, these B lymphocytes build the MHC class Two complex and they place that antigen onto that complex. And only then can some type of T cell T lymphocyte with this CD four Glycoprotein bind onto this MHC class Two complex that contains air antigen. And once this binding takes place, that ultimately stimulates this B lymphocyte to undergo mitosis divide. Many times and it basically differentiates into two different types of cells the plasma cells that basically produce the antibodies found inside our blood, swimming around our blood and lymph system.