Dr. Ramon Liobet, M.D., F.A.C.C and Dr. Samer Abbas, M.D., F.A.C.C. The circulatory system is an organ system that passes nutrients (such as amino acids and electrolytes), gases, hormones, blood cells, etc., to and from cells in the body to help fight diseases and help stabilize body temperature and pH to maintain homeostasis. This system may be seen strictly as a blood distribution network,...