Question

cardiology is the study and medical treatment of the heart. the root logy means the study of something. what does the root cardio mean? life own or self heart

Explanation:

The word "cardiology" is defined as the study and medical treatment of the heart. Since the suffix " - logy" means "the study of", the root "cardio" must relate to the main subject of the study, which is the heart.

Answer:

heart