The term anoxia means "without oxygen", an extreme form of hypoxia or "low oxygen". Anoxia and hypoxia may occur in various contexts: · Anoxic sea water · Dead zone or hypoxic zones · Hypoxia · Hypoxia See also · Oxygen saturation, a relative measure of the oxygen dissolved or carried in a medium; a measure of the severity of hypoxic conditions. · Oxygen toxicity (hyperoxia), the opposite condition of hypoxia, an excess of oxygen in body tissues.

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