MICR 2420 Lecture Notes - Lecture 12: Adaptive Immune System, Lymph Node, Adenoid
Document Summary
Not all of them are disease-causing - pathogens. We have a first line of defense: this includes many physical and chemical barriers that help us exclude and manage microbes. When the barriers are breached (broken), the immune system comes into play. A complex and interconnected system of: lymphoid organs, tissues, cells, cell soluble products. Tonsils and adenoids, lymph nodes, thymus, lymphatic vessels, appendix all along gi tract, which gets in the most contact with microbes. The primary organs: bone marrow and thymus all the others are secondary organs. All of these work to recognize, neutralize, control and/or eliminate potential pathogenic threats. Collectively, the immune system can respond to almost any foreign (non-self) molecular structure. The innate system the system we are born with ready from the beginning. The adaptive system we teach it to be active. Also called the non-specific or non-adaptive system.