The most authoritative answer in 2024
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Olivia Morris——Studied at Harvard University, Lives in Boston. Passionate about environmental sustainability and currently working for a conservation organization.
Hello, I'm an expert in the field of biology and physiology. When it comes to the color of blood that is rich in oxygen, it's important to understand the role of hemoglobin, a protein in red blood cells that carries oxygen.
Blood that is rich in oxygen is bright red in color. This is because when hemoglobin binds to oxygen, it changes its structure and gives the blood a vibrant red appearance. This type of blood is often referred to as arterial blood because it is pumped by the heart from the lungs, where oxygen has been loaded onto the hemoglobin, to the rest of the body.
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Audrey Morgan——Studied at University of Melbourne, Lives in Melbourne, Australia
Since arteries carry oxygen-rich blood away from the heart and veins carry oxygen-depleted blood back to the heart, some people believe that veins appear blue because blood without oxygen is blue. But it's not true! Blood is always red. Oxygen-rich blood is bright red as it leaves the heart.read more >>
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