Final answer:
The condition of unequal cell size in red blood cells is known as Anisocytosis. It signifies the presence of RBCs of different sizes, which can indicate various types of anemia and have effects on oxygen delivery to tissues.
Step-by-step explanation:
The condition of unequal cell size; excessive variation in RBC size is known as Anisocytosis (A). This hematological condition is characterized by the presence of red blood cells (RBCs) of varying sizes. It is important because it often reflects underlying disorders, such as different types of anemia. Anemia can be a result of blood loss, faulty or decreased RBC production, or excessive destruction of RBCs. The morphological approach to diagnosing these conditions involves paying particular emphasis to RBC size. Normal-sized cells are referred to as normocytic, smaller-than-normal cells are known as microcytic, and larger-than-normal cells are called macrocytic. Anisocytosis can be identified by measuring the mean corpuscle volume (MCV), as it reflects variances in cell size. Additionally, reticulocyte counts can indicate inadequate production of RBCs. Anemias can lead to a reduced delivery of oxygen to body tissues, causing fatigue, lethargy, and increased risk for infection.