Final answer:
The phrase 'Never Let Monkeys Eat Bananas' helps remember the descending order of leukocytes based on their abundance in the blood, including both granulocytes and agranulocytes.
Step-by-step explanation:
To remember the decreasing order of granulocytes, the phrase often used is 'Never Let Monkeys Eat Bananas,' which stands for Neutrophils, Lymphocytes (technically an agranulocyte), Monocytes (another agranulocyte), Eosinophils, and Basophils. This phrase helps recall the relative abundance of each cell type in the blood, with neutrophils being the most abundant and basophils the least.
Granulocytes and agranulocytes are two categories of white blood cells that play crucial roles in the immune system. Granulocytes, which include neutrophils, eosinophils, and basophils, have a lobed nucleus and contain granules in their cytoplasm that are visible with staining. These cells are typically first responders during injury or infection. On the other hand, agranulocytes have a simpler nucleus shape and their granules are not as visible; they include lymphocytes (such as B cells and T cells) and monocytes, which evolve into macrophages and dendritic cells.