Mondo Knows Facts
Living high raises the blood's oxygen carrying capacity
Weeks at altitude increase red cell mass and the hormone that drives it Low oxygen at altitude triggers extra erythropoietin from the kidneys within hours. Over weeks the marrow produces more red cells, raising the blood's oxygen carrying capacity. Other adjustments include a faster breathing rate and shifts in how tightly haemoglobin holds oxygen. It sits in Mondo's human body collection, one of 200 facts that each trace back to the reference below.
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Heat acclimatisation changes how you sweatRepeated heat exposure makes sweating start sooner and become more diluteRapid pressure change can liberate gas in the bloodNitrogen dissolved under pressure forms bubbles when the pressure falls quicklyHuman blood vessels could circle the Earth two and a half timesStretching capilliaries arteries and veins end to end totals 100,000 kilometresThe body produces millions of red blood cells every secondRed blood cells circulate for about 120 days before being recycledAn average adult body contains about five litres of bloodBlood accounts for roughly seven to eight percent of total adult body weightWhite blood cells defend the body against infectious pathogensLeukocytes circulate in blood and tissue to destroy invading bacteria and viruses
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Tags: altitude, blood, acclimatisation
Living high raises the blood's oxygen carrying capacity: the short answers
- Where does this come from, and can I check it?
- Weeks at altitude increase red cell mass and the hormone that drives it. The figure is taken from WHO, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
- Is this really a human body fact?
- Yes. It sits on the Human Body shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
- What else can I read about it?
- The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.