Atlas One · Host Biology · Scale 02 — Atomic

Oxygen

Oxygen (O, Z=8, [He] 2s² 2p⁴). Biologically as O₂ (respiratory substrate, ~250 mL/min at rest), O²⁻ (superoxide, ROS), and cofactor in oxidases. Carried by haemoglobin in erythrocytes; released by Bohr effect. Rises 20-fold in maximal exercise.

Also known as: O, O2, dioxygen, molecular oxygen, O₂

Scale 02 — AtomicScale
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2026-06-03Last Reviewed
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oxygen

Oxygen

Oxygen (O, Z=8, [He] 2s² 2p⁴). Biologically as O₂ (respiratory substrate, ~250 mL/min at rest), O²⁻ (superoxide, ROS), and cofactor in oxidases. Carried by haemoglobin in erythrocytes; released by Bohr effect. Rises 20-fold in maximal exercise.