TY - CHAP M1 - Book, Section TI - The Immune System & Lymphoid Organs A1 - Mescher, Anthony L. Y1 - 2018 N1 - T2 - Junqueira’s Basic Histology: Text and Atlas, 15e AB - The immune system provides defense or immunity against infectious agents ranging from viruses to multicellular parasites. Histologically this system consists of a large, diverse population of leukocytes located within every tissue of the body and lymphoid organs interconnected only by the blood and lymphatic circulation. Immunity obviously has tremendous medical importance, one part of which focuses on autoimmune diseases in which immune cells begin to function abnormally and attack molecular components of the body’s own organs. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/20 UR - accessmedicine.mhmedical.com/content.aspx?aid=1160662533 ER -