CBSE Class 10 Science 2019 · Paper 31/1/2 · Question 4
How is and transported in human beings?
Answer
Oxygen is carried by haemoglobin in red blood cells; carbon dioxide, being more soluble, travels mostly dissolved in the plasma.
Oxygen is carried by haemoglobin, the respiratory pigment present in the red blood cells. Haemoglobin has a very high affinity for oxygen: it takes up oxygen in the lungs and releases it in the tissues.
Carbon dioxide is more soluble in water than oxygen, so it is transported mostly in dissolved form in the blood plasma, from the tissues to the lungs, where it is breathed out.
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