URL: https://www.desy.de/school/school_lab/zeuthen_site/vacuum_lab/vacuum_information/applications/the_human_body/index_eng.html
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The Human Body
We need a vacuum to survive, as unreasonable as it may sound. We only can breathe by means of establishing less pressure in our lungs than residing in the atmosphere surrounding us. This low pressure emerges, because the lung’s volume is increased.
If somebody creates a vacuum on our skin, a hickey is produced.
