How to Memorize White Blood Cells Types and their Abundance

Leucocytes or leukocytes, colloquially known as white blood cells (WBCs), are clear, colorless cells that circulate in the blood and lymph and are integral part of the immune system.[

Leucocytes are divided into the types: neutrophils, eosinophils, basophils, lymphocytes and monocytes. Each of these types has further derivatives, for example Natural killer cells are derivative of lymphocytes.