the electron microscopic appearance of this macrophage shows that the cell has ferritin free in the cytoplasm and several types of cytoplasmic granules : those with large quantities of electron-dense ferritin and/or hemosiderin ( type a ) , elongated granules ( type b ) with moderately electron dense homogeneous matrix and some ferritin at the periphery , and granules with heterogeneous content ( type c ) .
C0007634
cell
C0010834
cytoplasm