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Organ Systems › View

This system regulates the metabolism and works with other systems to regulate horomones.  The thyroid gland is an organ of this system.  

A. nervous

B. reproductive

C. digestive

D. endocrine

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Terms and Definitions - Diseases › View

An abnormal reaction to a foreign substance

A. disease

B. pathogen

C. infectious disease

D. non infectious disease

E. Allergy

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