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growth spurt
a period of rapid growth
adulthood
the longest stage of the human life cycle
pathogen
an agent that causes communicable diseases
noncommunicable disease
a disease that can't spread from person to person
tears, mucus, and skin
barriers to pathogens
stimulant
a drug that speeds up the nervous system
dependence
the physical or mental need for a drug
depressant
a drug that slows down the nervous system
communicable disease
a disease that can spread from person to person
melmel
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