The Immune System

A substance prepared from killed or weakened pathogens that is introduced into the body to produce immunity is called a ______________.

• cancer

• allergy

• vaccine

• macrophage

Once a pathogen enters your body, it produces ___________________ which remember that pathogen, so if it enters your body again your body attacks it right away.

• memory cells

• allergies

• vaccination

• macrophages

________________ is the ability to resist or recover from an infectious disease.

• memory cells

• vaccination

• immunity

• allergy

A ___________________ is a white blood cell that destroys pathogens by engulfing and digesting them.

• vaccination

• macrophage

• T cell

• B cell

A _____________________ coordinates the body's immune response. (they activate and attack)

• vaccination

• immunity

• B cell

• T cell

___________________ make antibodies that attach to specific antigens and mark the pathogen for destruction.

• allergies

• macrophages

• B cells

• T cells

A _____________ is a specialized protein that binds to an antigen and tags it for destruction

• antibody

• vaccine

The ____________________ is made up of tissues and specialized white blood cells that recognize and attack foreign substances in the body.

• digestive system

• nervous system

• cardiac system

• immune system

Inflammation, sending platelets to a wound, fevers, and increased blood flow are examples of ____________ defenses.

• internal

• external

Your skin, nails, hair, oils, sweat, and mucus are examples of your body's _____________ defenses.

• internal

• external