B lymphocyte

B lymphocytes, or B cells, are a type of white blood cell crucial to the immune system. They help protect the body by recognizing specific germs, like bacteria or viruses, through special receptors on their surface. When a B cell encounters its matching germ, it can produce proteins called antibodies that bind to and help eliminate the invader. B cells also remember past infections, enabling the immune system to respond more quickly if the same pathogen returns. Overall, B lymphocytes are essential for adaptive immunity, providing targeted defense and long-term immune memory.