Which of the following are main components of the immune system?

The main components of the immune system primarily include white blood cells and antibodies. White blood cells, or leukocytes, play a crucial role in defending the body against infections and foreign invaders. They are responsible for identifying and attacking pathogens such as bacteria, viruses, and parasites. Different types of white blood cells, including lymphocytes (such as B cells and T cells), help orchestrate the immune response, with B cells producing antibodies.

Antibodies are proteins created by B cells in response to specific antigens on pathogens. They bind to these antigens, neutralizing them or marking them for destruction by other immune components. The combination of white blood cells and antibodies forms a robust defense mechanism that protects the body from disease and enables immune memory for faster responses to subsequent infections.

Other options listed do not represent the primary components of the immune system. Red blood cells and platelets are essential for oxygen transport and blood clotting, respectively, but do not directly participate in immune responses. Bone marrow is crucial for the production of blood cells, including white blood cells, but it is more of a site of cell production than a component of the immune system itself. Skin serves as a physical barrier and is part of the innate immune system, but it is not