What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Immunoglobulins, T Cells, Antibodies and Antigens

Immune system in the living organisms is responsible for protection against diseases. In fact, the function of the immune system is to identify neutralize harmful bacteria and viruses by means of antibodies. We can say that when the immune system becomes week in the human body, the body is attacked by various diseases.