cardiovascular(relating to the circulatory system) adjective [UK: ˌkɑː.diəʊ.ˈvæ.skjə.lə(r)] [US: ˌkɑː.dio.ʊ.ˈvæ.skjə.lə(r)]Lungs, heart, veins, arteries and capillaries form the cardiovascular system. = Los pulmones, el corazón, la venas, arterias y pequeños capilares forman el sistema cardiovascular.