The arrow in the blood smear micrograph is pointing to a neutrophil as the cytoplasm is also slightly basophilic (stains blue), which is typical of neutrophils.
Neutrophils are the most abundant type of white blood cell, accounting for about 50-70% of all white blood cells. They are the first responders to infection and play a vital role in the body's immune system.
Neutrophils are characterized by their multi-lobed nucleus and abundant cytoplasm filled with granules and the granules contain enzymes that can destroy bacteria and other foreign invaders.
In the blood smear micrograph, the neutrophil can be identified by its multi-lobed nucleus and abundant cytoplasm.