Immune System Basics
What is the immune system?
This system defends the body against germs and diseases.
These are the main cells that fight infections.
What are white blood cells?
This is a type of germ that needs a host to survive and reproduce.
What is a virus?
Vaccines help the immune system create these to fight infections.
What are antibodies?
This common condition happens when the immune system overreacts to something harmless.
What is an allergy/
The immune system recognizes harmful invaders called...
What are pathogens?
These cells "eat" and destroy harmful invaders.
What are macrophages?
Unlike viruses, these single-celled organisms can live on their own.
What are bacteria?
This type of immunity is passed from mother to baby.
What is passive immunity?
This disease attacks the immune system itself, making it weak.
What is HIV/AIDS?
What is the bone marrow?
These cells create antibodies to fight specific infections.
What are B cells?
This illness is caused by a virus and can make you cough and sneeze.
What is the flu?
Scientists create vaccines using weak or inactive parts of:
When the immune system attacks the body's own cells it's called this.
What is an autoimmune disease?
The immune system includes tiny filters called these, which trap germs.
What are lymph nodes?
These cells attack infected or cancerous cells directly.
What are T cells?
The immune system responds to infections by raising this.
What is fever?
This type of immunity happens when you get an infection and recover.
What is natural immunity?
This condition causes inflammation in joints due to an immune system attacks.
What is rheumatoid arthritis?
This body system works closely with the immune system to circulate white blood cells.
What is the circulatory system?
This type of white blood cells remembers past infections to prevent future illness.
What are memory cells?
This is the first line of defense against germs entering the body.
What is the skin?
This term describes when enough people are immune, protecting those who are not.
What is hard immunity?
In severe allergic reactions, a person can experience this life-threatening response.
What is anaphylaxis?