Which medical suffix indicates something is related to blood?

The suffix that indicates something is related to blood is "-emia." This term is used in various medical contexts to describe conditions associated with blood. For example, "anemia" refers to a deficiency of red blood cells or hemoglobin in the blood, while "hyperemia" signifies an excess of blood in a particular area.

The other suffixes have different meanings and uses in medical terminology. "-cyt" refers to cells, making it relevant to the study of cellular aspects but not directly related to blood itself. "-logy" denotes the study of a subject, such as in "biology," which does not specifically relate to blood but rather to the study of living organisms. Lastly, "-genic" indicates something that produces or causes, often used in terms like "carcinogenic," which relates to cancer production, rather than directly to blood. Thus, "-emia" stands out as the appropriate suffix for describing conditions concerning blood.