Specialized White Blood Cells Called Lymphocytes That Fight Infection Either

Specialized white blood cells called lymphocytes that fight infection either as B cells or T cells circulate in the blood, searching for invading pathogens. A nurse identifies that these types of cells represent

A) Primary defenses.
B) Secondary defenses.
C) Tertiary defenses.
D) Systemic defenses.
Multiple Response
Identify one or more choices that best complete the statement or answer the question.