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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.
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Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
![Older adults may grieve intensely over the loss of a person or situation that has been a part of the](https://biology-forums.com/gallery/47/medium_18099_25_09_12_12_17_57.jpeg)
![EEG recordings showing the differences between normal, absence seizure, and generalized tonic–clonic](https://biology-forums.com/gallery/47/medium_6_26_12_14_9_03_30_196201827.jpeg)