What does the combining form 'cardi/o' relate to?

The combining form 'cardi/o' is derived from the Greek word "kardia," which translates to "heart." In medical terminology, this combining form is commonly used to create terms related to the heart and its functions, such as cardiology (the study of the heart) and cardiovascular (pertaining to the heart and blood vessels). Understanding this root helps in the decoding of various medical terms, making it crucial for anyone in the medical field to grasp the language that describes the cardiovascular system and its conditions.