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This animation explains the human immune system in a simple way and with high-quality graphics. It explains the feeding of macrophages, the formation of T cells in the thymus and the skin microbiome. 00:20 Skin and the microbiome as protection 01:18 Mucous membranes with cilia 01:55 Cough as a protective reflex 02:15 Formation of immune cells from stromal 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 Formation of platelets in bone marrow 12:38 Hemostasis (process of stopping bleeding)