Final answer:
Anemia is a disease that results in a lack of oxygen delivery to body cells. It can cause symptoms such as fatigue, headaches, and confusion.
Step-by-step explanation:
Anemia is a disease in which there is an inadequate volume of red blood cells, resulting in a lack of oxygen delivery to body cells. This condition can cause symptoms such as fatigue, headaches, and confusion, collectively referred to as hypoxia. Anemia can be caused by factors such as blood loss, destruction of red blood cells, or a deficiency in red blood cell production.