Higher magnification view of peripheral blood smear showing iron deficiency anaemia. RBCs (stained in pink) have become smaller in size than normal. The increase of white space in the center helps pathologists to identify the condition of low hemoglobin in the RBCs. E. Uthman, MD, Wikimedia Commons
Microscopic picture of peripheral blood smear showing a normal condition of the blood. RBCs are stained pink/ grey and WBCs appear dark purple as their nucleus (DNA) is so stained. The purple dots against the white background are platelets (effective in blood clotting). Microrao, Wikimedia Commons
Hairy cell leukaemia- Peripheral Blood Smears showing leukaemia (cancer of white blood cells). Both images show the blood cells at different magnifications, hence the size of the cells is different. Unknown photographer and Paulo Henrique Orlandi Mourao, Wikimedia Commons