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How does oxygen actually reach every cell in your body?
Oxygen transport in blood mainly occurs through hemoglobin present in red blood cells. About 97% of oxygen binds reversibly with hemoglobin to form oxyhemoglobin, while a small amount is transported dissolved in plasma. In the lungs, oxygen diffuses into the blood and binds to hemoglobin, and in tissues, it is released where it is needed the most. Factors like partial pressure of oxygen, carbon dioxide concentration, temperature, and pH regulate this process, ensuring efficient oxygen delivery to tissues.
This mechanism is essential for cellular respiration and energy production, and it is a high-yield concept for NEET and medical entrance examinations.
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