What causes blood to be red, what is the science behind it?

What causes blood to be red, what is the science behind it?

Whatever the color of a person’s body may be, black, fair or brown, the color of the blood present within him is always red. Apart from humans, the color of blood of animals is also red. However, there are some creatures on this earth whose blood color is blue or white. But the color of blood of most animals is red, no matter which species they belong to. Let us know why this happens. Why is the color of blood red The red color of blood is mainly due to…

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