What type of cells are B cells classified as?

B cells are classified as lymphocytes, which are a specific type of white blood cell integral to the adaptive immune response. They play a crucial role in the body's defense mechanisms by producing antibodies that target and neutralize pathogens such as bacteria and viruses. Lymphocytes, including B cells and T cells, are characterized by their large nucleus and minimal cytoplasm, which distinguishes them from other types of immune cells.

In contrast, the other cell types listed have different functions and characteristics. Macrophages are a type of phagocyte involved in engulfing and digesting cellular debris and pathogens. Cytotoxic cells, particularly cytotoxic T cells, are specialized for directly killing infected or cancerous cells. Neutrophils are also phagocytic cells, and they are primarily involved in the initial response to infection, rapidly responding to sites of inflammation or injury.

Understanding that B cells are a subtype of lymphocytes highlights their specialized function in the immune system and sets them apart from other immune cell types that operate through different mechanisms.