What is an iron deficiency anemia? How does it arise? How is it treated? What is the morphologic appearance of the red cells?  What is the effect of vitamin B 12 and folic acid on blood cell...

What is an iron deficiency anemia? How does it arise? How is it treated? What is the morphologic appearance of the red cells?

 What is the effect of vitamin B₁₂
and folic acid on blood cell maturation? What type of anemia results from deficiency of these vitamins?