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chapter 14 science vocabulary
chapter 14 science vocab. Mr. Latimer's class
15
Science
5th Grade
09/04/2009

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Term
disease
Definition
an abnormal condition in a living organism causing illiness
Term
pathogen
Definition
an organism or particle that causes disease
Term
infectious disease
Definition
a contagious disease caused by pathogens
Term
noninfectious disease
Definition
a disease that is not caused by pathogens and is not contagious
Term
acute
Definition
beginning suddenly and lasting for a short time
Term
chronic
Definition
lasting for a long time and/or recurring frequently
Term
virus
Definition
a tiny, nonliving particle that can infect cells and cause disease
Term
genetic disorder
Definition
an abnormal condition that is usually inherited through genes
Term
allergy
Definition
an abnormal reaction to a foreign substance
Term
allergen
Definition
a substance that provokes allergies
Term
lymphatic system
Definition
a major component of the immune system that protects the body from pathogens
Term
lymph node
Definition
a rounded mass of tissue that filters fluids from other body tissues and traps pathogens
Term
immune response
Definition
the series of reactions that take place when white blood cells fight against infection
Term
immunity
Definition
the body's ability to protect itself from pathogens before they can cause disease.
Term
active immunity
Definition
a type of immunity in chich the immune system produces antibodies in response to the presence of a pathogen
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