Why are neutrophils classified as granulocytes along with eosinophils and basophils?

How do neutrophils appear histologically?

Here is a picture of a neutrophil.

How long do neutrophils circulate in the blood before entering the tissues?

In infections in which neutrophils respond, what proportion of circulating leukocytes do they constitute?

At what stage in an immune response do neutrophils arrive at a site of inflammation?

What are the three basic steps involved in neutrophil extravasation?

What attracts neutrophils to a site of inflammation?

Neutrophils differ from macrophages in that they have primary and secondary granules. Describe each of these. What do they contain and do?