Examlex
Instructions: Identify the following. Be as specific as possible, and include names, dates, and relevant facts as appropriate. Be sure to explain the significance of the person or term.
"Trail of Tears"
Carbon Dioxide
A gas that lacks both color and odor, resulting from the combustion of carbon-based substances and the respiration process, and is utilized by plants for photosynthesis.
Allergies
Allergies are immune system responses to typically harmless substances, called allergens, which can cause symptoms such as sneezing, itching, and more severe reactions like anaphylaxis.
Parasitic Infestation
The presence and growth of parasites on or within a host organism, causing harm to the host.
Macrophages
A type of white blood cell within tissues that engulfs and digests cellular debris, foreign substances, microbes, and cancer cells.
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