Knowledge Check

In adult humans, 2 million newly synthesized erythrocytes are released in the circulation every second. Erythropoiesis requires 20 to 30 mg of iron per day, far more than the amount absorbed from diet. Developing erythrocytes acquire their iron primarily from:

a
Thymus
Bone marrow
b
Skeletal muscle
c
Diet
d
Macrophages of the reticuloendothelial system