Is blood really blue inside your veins if so then why is it red when we bleed?

Answer 1

the cells react to the oxygen in the air.

Answer 2

I am not believing these answers. They are either from morons or 10 yr olds. Blood is red inside as well as out. Think about it. If you have blood drawn it goes into the syringe red and has not been exposed to any oxygen. I am attaching the excerpt from google about the origin of blue bloods.
Unlike so many other expressions, this one is well documented. It’s a direct translation of the Spanish sangre azul. Many of the oldest and proudest families of Castile used to boast that they were pure bred, having no link with the Moors who had for so long controlled the country, or indeed any other group. As a mark of this, they pointed to their veins, which seemed bluer in colour than those of such foreigners. This was simply because the blue-tinted venous blood showed up more prominently in their lighter skin, but they took it to be a mark of their pure breeding. So the phrase blue blood came to refer to the blood which flowed in the veins of the oldest and most aristocratic families. The phrase was taken over into English in the 1830s.

Answer 3

The blood turns a "blue" color when it is out of oxygen, and on the way back to the lungs and heart. When you bleed, the blood absorbs the oxygen in the air and turns red again.

Answer 4

NO!

Blood is always red. "Blue blood" is one of the silly myths that just won't go away.

I think this myth became prominent through time and maybe because the original use for the expression, "blue blood," has been largely forgotten.

"BLUE BLOOD" is an English expression for noble birth or descent. It may be derived from an original Spanish phrase, or simply refer to the delicate, pale skin favoured within that social circle, which more transparently reveals the blueness of the veins and arteries beneath.

Answer 5

It's more of a purple color inside your veins and the reason it is a rich red when we bleed is because it is oxygenated. Blood is red when it has oxygen in it and bluish purplish when it has less oxygen.

Answer 6

it's not blue, it's just that hemoglobin htat runs through our blood is the pigment, this is why blood is red, it's not blue, when it's drawn, the blood whihc passes through the veins are blue becuase they carry blood without oxygen, and arteries are drawn red cause they carry blood with oxygen. and the spanish expression is that "la realeza tiene sangre azul" meaning that royalty has blue blood, although i'm not so sure it's that specific quote.

Answer 7

one site says:

Blood is *never* blue. Blood is described as dark red (venous) or bright red (arterial). Our veins look blue because we are looking at them *through* our skin. The blood inside them is dark red and it doesn't reflect light very well. The blood you see when you get hurt is usually venous blood. Arterial blood comes out in spurts. It spurts every time the heart beats. I hope you never see that

and another:
As the blue blood flows through the main pulmonary artery to the lungs the pulmonary artery branches to smaller and smaller pulmonary arteries and then those branch into very tiny blood vessels called capillaries. The capillaries come around and encircle the walls of the air sacs (aveoli).

The aveoli contain high oxygen content and low carbon dioxide content. The blue blood contains low oxygen content and high carbon dioxide content. At the surface of contact with the aveoli, the blue blood releases its carbon dioxide to the air sac and gets oxygen from it and becomes red.

i, myself, believe the second one. that's what i was always taught

Answer 8

the less oxygen it has the bluer it gets that's why you see in books of vines blue a red the red is the ones that just left lungs blue is the blood returning to lungs

Answer 9

Blood is red it looks blue when you are looking through your skin.

Answer 10

yes blood is blue
look at your veins they look blue

Answer 11

when the blood comes in contact with oxygen it automatically turns red