Complete this concept map to summarize the key concepts concerning the body's defenses.

In a series of immune system experiments, the thymus glands were removed from baby mice. Which of the following would you predict as a likely result?

Antibodies are in which class of proteins?

Which choice below describes a function of white blood cells that helps them carry out defensive functions more effectively?

Which of these is not part of insect immunity?a. enzyme activation of pathogen-killing chemicalsb. activation of natural killer cellsc. phagocytosis by hemocytesd. production of antimicrobial peptides

Foreign molecules that elicit an immune response are calleda. major histocompatibility complex (MHC) molecules.b. antibodies.c. histamines.d. antigens.

Which statement describes what would most likely happen to microbes in the blood?

Which of the following is the main factor that causes lymph to move through lymphatic vessels?

Phagocytosis is best defined as __________.