Final answer:
Anemia is a disorder in which the blood has an inadequate volume of red blood cells, leading to a lack of oxygen in the body's tissues.
Step-by-step explanation:
Anemia is a disorder in which the blood has an inadequate volume of red blood cells, reducing the amount of oxygen that the blood can carry. This can lead to a lack of oxygen in the body's tissues, causing weakness and fatigue. Anemia can be caused by a loss of blood, the destruction of red blood cells, or a lack of red blood cell production.