Why Do They Say ‘Blue Blood’?

Why Do They Say 'Blue Blood'?

Aristocrats have been referred to as “blue bloods” for millennia. The word is often understood to refer to the ancient and aristocratic families’ bloodlines.

Blue bloods come from affluent, powerful, and privileged noble families. People that are connected to you share your blood, which is a term that has long been used to describe familial relationships. Blue bloods are members of an exclusive class of families, the aristocracy.

But where did this peculiar phrase come from? Why did our forefathers think the nobleman’s blood was blue? Let’s investigate.

Can a Person Have Blue Blood?

Aristocrats have been referred to as “blue bloods” for millennia. The word is often understood to refer to the ancient and aristocratic families’ bloodlines.

Blue bloods come from affluent, powerful, and privileged noble families. People that are connected to you share your blood, which is a term that has long been used to describe familial relationships. Blue bloods are members of an exclusive class of families, the aristocracy.

But where did this peculiar phrase come from? Why did our forefathers think the nobleman’s blood was blue? Let’s investigate.

Why then We See Our Veins Blue?

Why do veins seem blue if all blood is red?

It turns out that the skin that covers our veins and protects them from the outside world is more responsible for their color than the blood that flows through them. Due to the fact that our skin absorbs more red light than blue light, the veins seem blue to us because they reflect blue light back to the outside environment.

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Veins and arteries would seem to be the same color if the skin were removed (this is just a thought experiment; do not do this in real life!).

Therefore, no one is of blue blood.

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