The blood has three types of formed elements: erythrocytes (red blood cells), leukocytes (white blood cells),
and platelets or thrombocytes .
Erythrocytes: Also called red blood ...
Platelets:
Most are 1/5 to 1/3 the size of a normal RBC .
They are typically round with a blue-bray cytoplasm.
Cytoplasm with purple/blue granules.
Increased in:
Iron deficiency ...