Multiple choice

Functions in the immune system

  1. Plasma

  2. Red Blood Cells

  3. White Blood Cells

  4. Platelets

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

White blood cells, or leukocytes, are the primary cells of the immune system responsible for defending the body against pathogens, infections, and foreign materials. Red blood cells are responsible for oxygen transport, platelets assist in blood clotting, and plasma is the liquid medium that carries these cells.