Fundamentals of the Immune System: Organs, Barriers, and Cellular Components of Innate Immunity.

his course explores the foundations of body defense, beginning with the primary and secondary lymphoid organs (bone marrow, thymus, spleen), moving through physical and chemical barriers (skin, mucus, gastric acid), and concluding with the specific mechanisms of innate immune cells (phagocytes, NK cells, and granulocytes).