What is the term for a decrease in red blood cells?

Anemia refers to a condition characterized by a decrease in the number of red blood cells (RBCs) or a lower than normal hemoglobin concentration in the blood. This decrease can lead to insufficient oxygen delivery to bodily tissues, resulting in symptoms such as fatigue, weakness, and pallor. Anemia can be caused by a variety of factors, including nutritional deficiencies, chronic diseases, or bone marrow disorders.

In contrast, leukopenia refers to a reduction in white blood cells, which are crucial for immune function. Thrombocytopenia indicates a lower-than-normal platelet count, which is important for blood clotting. Erythrocytosis is the opposite of anemia, signifying an increase in red blood cells, often leading to thicker blood. Understanding these definitions helps clarify why anemia is specifically the term for a decrease in red blood cells.