British spelling: the present participle of arterialise; the ongoing process of converting venous blood to arterial blood.
From arterialise + -ing suffix, forming the present participle. The -ing form functions as both a gerund (noun) and progressive verb form in English.
In British medical literature, 'arterialising blood' describes the continuous process happening in your lungs right now—oxygen molecules are binding to hemoglobin and transforming deoxygenated blood into the oxygen-rich fuel your body depends on.
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