Which white blood cells comprise 20% to 30% of the circulating WBCs and are the cells that function in the body's third line of defense?

Question

Quizplus · Accepted Answer

Lymphocytes are the white blood cells that function in the body's third line of defense, which is the adaptive immune response. They make up 20% to 30% of the circulating WBCs and include B cells, T cells, and natural killer cells.

Which White Blood Cells Comprise 20% to 30% of the Circulating