cardiovascular system
Medical term referring to the heart and blood vessels as a functional unit.
Diseases of the cardiovascular system are closely related to lifestyle habits.
This medicine acts on the cardiovascular system.
循環器系 is a broader term for the circulatory system, which includes the cardiovascular system plus the lymphatic system. 心血管系 specifically refers to the heart and blood vessels.
Compound of 心 (heart), 血管 (blood vessel), and 系 (system). A modern medical term formed from Sino-Japanese elements.