https://medlineplus.gov/lab-tests/barium-swallow/
Barium Swallow: MedlinePlus Medical Test
A barium swallow is an imaging test of your throat, esophagus, and stomach. Swallowing barium makes it easier for abnormal areas to be seen clearly on an x-ray.
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https://periodic-table.rsc.org/element/56/barium
Barium - Element information, properties and uses | Periodic Table
Element Barium (Ba), Group 2, Atomic Number 56, s-block, Mass 137.327. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
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