Platelets are derived from what parent cell?

Platelets are derived from what parent cell?

Lymphocytes (natural killer cells, T helper cells, and B cells) make up what percentage of white blood cells?

Lymphocytes (natural killer cells, T helper cells, and B cells) make up what percentage of white blood cells?

What is the role of macrophages in the immune response?

What is the role of macrophages in the immune response?

The process by which white blood cells move into and out of blood vessels is __________.

The process by which white blood cells move into and out of blood vessels is __________.

Monocytes make up what percent of the average white blood cell count?

Monocytes make up what percent of the average white blood cell count?