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Is it true that our blood in blue until it meets with outside oxygen?

Why is our Blood Red when it meets with Oxygen and blue when it doesn't?

  • Answer:

    Hemoglobin is the principal determinant of the color of blood in vertebrates. In vertebrates, arterial blood and capillary blood are bright red, as oxygen imparts a strong red color to the heme group. Deoxygenated blood is a darker shade of red with a bluish tinge; this is present in veins, and can be seen during blood donation and when venous blood samples are taken.

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Hemoglobin is the principal determinant of the color of blood in vertebrates. In vertebrates, arterial blood and capillary blood are bright red, as oxygen imparts a strong red color to the heme group. Deoxygenated blood is a darker shade of red with a bluish tinge; this is present in veins, and can be seen during blood donation and when venous blood samples are taken.

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