term1 Definition1term2 Definition2term3 Definition3
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GLAND
A group of cells that prepare and release a chemical for use by the body
A group of cells that......
VACCINE
A weakened or inactive version of a pathogen that stimulates the body's production of antibodies which can destroy the pathogen
A weakened or inactive version...
HORMONE
A chemical released in the bloodstream that sends signals to specific cells, causing them to change their behavior in specific ways
A chemical released in the........
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