White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders.All leukocytes are produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell.onocytes and neutrophils are phagocytic. The number of leukocytes in the blood is often an indicator of disease, and thus the WBC count is an important subset of the complete blood count. The normal white cell count is usually between 4 and 11 Ã 10 9 /L.
adjective. The definition of perky is someone who is cheerful, peppy and self-confident. A smiling, happy cheerleader with lots of energy is an example of someone who might be described as perky.
From Wikiquote. The Perks of Being a Wallflower is a 1999 novel by American novelist Stephen Chbosky. The story is a series of letters to an unknown recipient written by the narrator, a Pennsylvania teenager who calls himself Charlie (his real name is never mentioned â no one's real names are mentioned besides Alice).