Breathing and exchange of gases

  • 0_1576124631099_IMG_20191212_094737.jpg Ans is 3 explain please

  • @ankita-maurya
    Pulmonary vein carries blood from lungs so it has maximum oxygen i.e X
    Then from lungs systematic artery carries to different parts of body
    Systematic vein bring blood from different parts of body which has less partial pressure of oxygen i.e Y
    PaO2 – Partial pressure of oxygen at sea level (160 mmHg in the atmosphere) in arterial blood is between 75 mmHg and 100 mmHg. PvO2 – Oxygen tension in venous blood at sea level is between 30 mmHg and 40 mmHg.
    During exercise there is more oxygen required i.e least partial pressure of oxygen in blood.

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