In this animation, we will explain the human immune system with high-quality graphics never seen before. The phagocytosis of macrophages, the formation of T cells in the thymus, and the microbiome of the skin are explained. 00:20 Skin and microbiome as defense mechanism 01:18 Mucous membranes with cilia 01:55 Coughing as a protective reflex 02:15 Formation of immune cells from stem cells 03:15 Diapedesis of granulocytes 03:52 Chemotaxis of immune cells 04:19 Phagocytosis of bacteria 04:55 Macrophages as antigen-presenting cells 06:03 Formation of T cells (thymopoiesis) 07:35 Cytotoxic T cells and apoptosis 08:46 Different types of T cells 09:05 B cells, plasma cells and antibody formation 11:14 Opsonization of antigens 11:43 Types of immune cells 11:58 Platelet formation in bone marrow 12:38 Hemostasis (blood clotting, coagulation)