Which type of cell primarily produces antibodies in the immune system?

B cells are the primary cells responsible for the production of antibodies in the immune system. When B cells encounter a specific antigen, they become activated and differentiate into plasma cells. These plasma cells are the ones that synthesize and secrete large quantities of antibodies, which are proteins that specifically bind to the antigens, marking them for destruction or neutralization.

This process is a critical component of the adaptive immune response, as antibodies help to identify and eliminate pathogens such as bacteria and viruses. B cells also play a role in immunological memory, ensuring that the body can mount a faster and more effective response if the same antigen is encountered in the future.

In contrast, T cells are primarily involved in cellular immunity and help regulate the immune response but do not produce antibodies. Macrophages and dendritic cells are important for antigen presentation and act as antigen-presenting cells, but they do not produce antibodies either. Their role is to process and present antigens to T cells, thus helping to initiate and shape the adaptive immune response.