Final answer:
The CF thorac/o refers to the cardiovascular function of the chest or the heart and blood vessels within the chest cavity.
Step-by-step explanation:
The CF thorac/o is derived from the root word thorac/o, which means chest. In medical terminology, the prefix CF typically stands for cardiovascular function. Therefore, the term CF thorac/o refers to the cardiovascular function of the chest or the heart and blood vessels within the chest cavity.