Explain what happens in a person body who has anemia

anemia is termed to be a lack of red blood cells.

Results in a lack of oxygen flow to vital organs causing, dizziness, fatigue, light headedness and tachycardia.

Anemia is the shortage of red blood cells. Due to this there will in efficient diffusion of oxygen into blood and hence there would be lack of oxygenated blood in some vital organs which will cause dizziness, constant fever and headache fatigue (tiredness).