cardiovascular (adj.)

before vowels cardi-, word-forming element meaning "pertaining to the heart," from Latinized form of Greek kardia "heart," from PIE root *kerd- "heart."

1670s, in anatomy, "pertaining to conveyance or circulation of fluids," from Modern Latin vascularis "of or pertaining to vessels or tubes," from Latin vasculum "a small vessel," diminutive of vas "vessel."