capable of existence ends during circulatory system process fully formed stage anatomical system circulatory system 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[WP]. AAO:0000959 systema cardiovasculare VHOG:0001248 Wikipedia:Circulatory_system CALOHA:TS-2103 UBERON:0001009 nervous system gustatory system skeletal system musculoskeletal system biliary system exocrine system hematopoietic system immune system integumental system hepatobiliary system entire sense organ system excretory system