This is the immune systems’ second line of defense.
  • Plenty of sleep
  • Exercise
  • Healthy eating
  • Sneezing
The immune system works hand-in-hand with the _________.
  • nervous system
  • respiratory system
  • circulatory system
  • lymphatic system
This functions to form blood, store blood and filter blood. It controls and negates harmful bacteria that has found its way into the bloodstream.
  • Hormones
  • The spleen
  • Immunoglobulins
  • Granulocytes
This is a thin, flat gland that secretes the hormone which then stimulates the activity of the lymphocytes.
  • Bone marrow
  • The thymus
  • The spleen
  • Immunoglobulins
These are substances that originate in one area of the body and can affect other areas of the body. They use the blood stream to travel around the body.
  • Antibodies
  • Agranulocytes
  • Bone marrow
  • Hormones
There are __ major components that make up the immune system.
  • 9
  • 6
  • 8
  • 7
Parasites, toxins, viruses, bacteria and microbes are collectively known as _______.
  • diseases
  • illnesses
  • pathogens
  • critters
This is a series of enzymatic proteins found in normal blood that will seek out and destroy many types of bacteria and other foreign cells.
  • Lymphatic system
  • Circulatory system
  • Complement system
  • Immune system
White blood cells are also known as _________.
  • leukocytes
  • cytoplasm
  • neutrophils
  • basophils
The immune system’s first line of defense is ________.
  • the skin
  • antibodies
  • bone marrow
  • antibiotics
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