35 Bizarre Facts You Might Not Know!

Misconceptions About Blood Color

An urban legend persists, suggesting that our blood appears blue until exposed to oxygen. However, this notion is entirely erroneous; human blood is never genuinely blue, always exhibiting varying shades of red. The genesis of this myth likely stems from the observation that veins, responsible for returning blood to the heart, often present as bluish or greenish beneath the skin.

In reality, this phenomenon results from the interaction between our skin and subcutaneous tissue with light, causing veins to appear differently colored. Regardless of its exposure to oxygen, our blood retains its richness in this vital element, imparting a bright red hue when oxygenated and a darker shade of red when deoxygenated.