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Crystal size is controlled by temperature.
Stress
A physical, mental, or emotional factor that causes bodily or mental tension, often resulting from demanding circumstances.
Parasites
Organisms that live on or inside another organism (the host) and benefit at the host's expense, often causing harm.
Antigens
Substances, usually proteins, on the surface of bacteria, viruses, and other foreign substances, that trigger an immune response in the body.
Allergens
Substances that cause allergic reactions by triggering an immune response in susceptible individuals.
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