A group of leukocytes, called granulocytes, contain granules and play an important role in the immune system. ... Leukocyte granules are released in response to immunological stimuli during a process known as degranulation.

What is the main function of granulocytes?

Granulocytes are white blood cells that help the immune system fight off infection. They have a characteristic morphology; having large cytoplasmic granules, that can be stained by basic dyes, and a bi-lobed nucleus.

Why do bacteria store granules?

Concentrated deposits of certain substances which are presented/located in the cytoplasm of certain bacteria are known as cytoplasmic granules or inclusion bodies. They serve as storage areas for nutrients, e.g. volutin granules are reserves of high energy stored in the form of polymerized metaphosphate.