In medical terminology, what does "hemo-" refer to?

In medical terminology, the prefix "hemo-" is derived from the Greek word "haima," which means blood. This prefix is commonly used in various medical terms to denote a relationship to blood. For instance, "hemoglobin" refers to the protein in red blood cells that carries oxygen, and "hemorrhage" refers to excessive bleeding. Understanding this prefix is crucial for accurately interpreting a wide range of medical conditions and terminology associated with the circulatory system and blood-related issues. The other options refer to different bodily substances or structures and thus do not align with the meaning of "hemo-."