That's easy. When blood is in your body it is blue that's why your veins are blue. When oxygen meets the blood the blood turns red.
You need a microscope to see red blood cells.
Blood is actually a bluish,purplish color. Whenever you see blood, it is red because once the blood touches the air, it turns red.
no because bears can only smell blood and blood is red
the only fish that see colors live in the northern toptopia where they can see colors humans can see
That's easy. When blood is in your body it is blue that's why your veins are blue. When oxygen meets the blood the blood turns red.
red paint
You do not have red blood cells in the plasma. Plasma means blood minus red blood cells. So you see the original yellowish colour in case of the blood plasma.
If your blood was brown, that is old blood the body is expelling. If your blood has turned red, it is possible you are still pregnant, but you need to see a doctor.
Well not really you can see your vain in the wrist or hand and you see that they are blueish green but they can also be green blue orange purple red.
== == Blood looks red because the hemoglobin absorbs blue-yellow light when bound with oxygen. The reflected light is then red.
Oxygenated blood is bright red and deoxygenated blood is darker red.
See your doctor immedietly!