Cardiovascular system or circulatory system consist of the heart blood vessels and of course the lungs. So cardiovascular diseases relates to disorders of the parts of this system. The statement you posted is TRUE. This is the best answer i can come up with hope this helps.
Cardiovascular diseases are related to the malfunctions of the heart. Cardiovascular diseases are classified into chronic diseases which means long term diseases and acute which means short term. Cardio means heart. So the answer to this problem is heart.
