What is the combining form related to blood?

The combining form related to blood is "hem/o." This prefix derives from the Greek word "haima," which means blood. It is commonly used in various medical terms to denote conditions, processes, or substances associated with blood. For example, "hemoglobin" refers to the protein in red blood cells that carries oxygen, and "hemorrhage" refers to excessive blood loss. Understanding this combining form is essential in medical terminology, especially when discussing hematology, the study of blood and its disorders.

The other options represent different bodily concepts: "nat/o" refers to birth or origin, "hyster/o" pertains to the uterus, and "ment/o" relates to the mind. Each of these combining forms is used in different medical contexts, but only "hem/o" is directly connected to blood.