Examlex
The burning of fossil fuels produces nitrogen oxides and sulfur oxides which can react to form acid rain (nitric and sulfuric acids).
Lymph Node
A small, bean-shaped structure that is part of the lymphatic system and works as a filter for harmful substances.
Stomach Ulceration
The development of ulcers in the stomach lining, often caused by infection, excessive acid production, or prolonged use of certain medications.
Stress
A state of mental or emotional strain or tension resulting from adverse or demanding circumstances.
Sex
Biological and physiological characteristics that define humans as male or female.
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