Question

"most leukocytes function outside of the blood stream. given this fact why are they found in blood smears"

Answer 1

eukocytes are crucial to our defense against disease. They appear a mobile army that use to  protect the body from damage by bacteria, viruses, parasites, toxins, and tumor cells. As such, they have some special functional characteristics Three regions of blood smear, Counting area (monolayer): between body and feathered edge

Answer 2

Leukocyte function found in blood Smears because the following,

leukocytes are important for our protection versus infection and protection is provided by the immune system. They seem like a movable unit that exercise to shield the body from any kind of damage due to organisms like  bacteria, germs, parasitoids, poisons, and cyst cadres. They possess any  unique operative features. The three areas of blood smear are monolayer within the body and feathered border.