wat color is blood before it hits oxg. ???

Question

me and my girlfrend r hav a depate. i want to proov that blood is blue before it hits oxygen.

Answer 1

You are nearly right. It is more blueish (darker) when its de-oxygenated.

Answer 2

blood is not blue. Venous blood just appears blue through the skin for a couple of reasons:

1) It has very little oxygen, so it is a much darker red than oxygenated blood.

2) This darkness, plus the whitish color of the viens, causes the small amount of light that is diffused through the skin to appear blue.

Answer 3

Sorry, but you are going to lose that debate. Blood is always red. If you have ever had blood taken using a syringe, that will generally be de-oxygenated blood from a vein. It will be red. Arterial blood is just a brighter red. If you want proof, go and have a blood test and look at the blood in the syringe.

Answer 4

Blood is never blue. Blood that has a high oxygen content as it leaves the heart is light red. Blood that contains a very low oxygen content is dark red (blood returning to the heart). Tell her how is it then that when you donate blood, the blood filling the bag is not exposed to air compared to blood from an open cut. Then, how is the blood filling the bag red still???

Answer 5

Blood is just a darker shade of red when deoxygenated.

It looks blue in the veins as skin pigments, and blood vessels obscure the colour of light reflected to give a blue tinge.

Answer 6

Deoxygenated blood is bluish-red whereas oxygenated blood is orange-red. If you know your arteries and veins well, next time you bleed, check the colour of the blood out!

Answer 7

Blood is red in your veins. There is already oxygen in it, that's how oxygen gets delivered to your body.