Whenever you see blood outside your body, it looks red. Why? Human blood is red because of the protein hemoglobin, which contains a red-colored compound called heme that’s crucial for carrying oxygen ...

Whenever you see blood outside your body, it looks red. Why? Human blood is red because of the protein hemoglobin, which contains a red-colored compound called heme that’s crucial for carrying oxygen ...

No one, no matter how snooty, has actual blue blood. So why do veins look blue under the skin? Turns out, the answer lies in physics, not biology. Although de-oxygenated blood is coded blue in medical ...

Blood is red to the naked eye. Under a microscope, it depends. This isn't because it isn't really red, but rather because its redness is a macroscopic feature. Human blood is red because hemoglobin, ...

When you look through your skin in your wrist and see your blood veins, do they look blue or red? Most of you will probably answer blue. The fact that they look blue through the skin has led to many ...

Varicose veins are a common condition that affects millions of people and can lead to discomfort and complications if left untreated.

Note: Readers commenting under today's Friday Happy Hour post brought up an age old question: "Is blood blue when it's inside the veins?" Matt Soniak kindly put together this response. Why do veins ...

Whenever you see blood outside your body, it looks red. Why? Human blood is red because of the protein hemoglobin, which contains a red-colored compound called heme that’s crucial for carrying oxygen ...

What happens in our body that make our veins look blue, although they are full of red blood? Follow Tech Insider: On Facebook Following is a transcript of the video: If our blood is red, then why do ...

Human blood is red because of the protein hemoglobin, which contains a red-colored compound called heme that’s crucial for carrying oxygen through your bloodstream. Heme contains an iron atom which ...