What are molecules that the defense system recognizes as foreign to the body?
Allergies lungs antigens bacteria parasites atoms red blood cells acetic acid
A B C D E F G H
Children are born with an immature immune, or defense, system.
Antigens are molecules that the defense system recognizes as foreign to the body
What are molecules that the defense system recognizes as foreign to the body? (A) Allergies (B) lungs (C) antigens (D) bacteria (E) parasites (F) atoms (G) red blood cells (H) acetic acid