What color is human blood?

Answer 1

In humans and other hemoglobin-using creatures, oxygenated blood is bright red. This is due to oxygenated iron in the red blood cells. Deoxygenated blood is a darker shade of red, which can be seen during blood donation and when venous blood samples are taken. However, due to an optical effect caused by the way in which light penetrates through the skin, veins typically appear blue in color. This has led to a common misconception that venous blood is blue before it is exposed to air. Another reason for this misconception is that medical charts always show venous blood as blue in order to distinguish it from arterial blood which is depicted as red on the same chart.

Answer 2

Blood red is a probable viva answer.
To elaborate, the colour of blood is not constant..both physiological and pathological conditions change the blood colour.
1) Physiological changes:
a-oxygenated blood is a lighter shade of red, almost pink.
b-deoxygenated blood is deep red.
c-any physiological condition causing erythrocytosis causes deepening of the colour of the blood (this particular chage is not evident unless the increase is extreme.
2)Pathological changes:
a-hypoxia/asphyxia increase the dark coloured blood.
b-in hypochromic anemia (eg. Iron deficiency anemia), colour decreases.
There are many more factors, these being a few examples I can remember.

Answer 3

Red

Answer 4

Human blood is dark red due to presence of iron containing compound Haemoglobin in red blood corpuscles.It combines with oxygen forming oxyhaemoglobin and helps in purifying blood .

Answer 5

It is a dark red color, and will become a brighter red when saturated with oxygen. It is never "blue" or "purple" as the people above are indicating.

Answer 6

:)
Come on people! Blue blood? Did you ever bleed?
You have been looking at colored anatomical atlases too often!
Listen to DEDA, he knows!
The color is blue in the inside, but when you look at it, it is red?! Strange idea...
Blood is red, dark or bright based on oxygenization.

Answer 7

In normal blood;
Arterial blood is bright red
Venous blood is dark red
The plasma and serum components are coloured light yellow when separated from the cellular elements.

Answer 8

I am on dialysis, watching my blood every second night. It's dark red and bright. No other colors. If you see other colors you are already dead.

Answer 9

human blood is colorless.
blood has presence of RBC carrying O2 which gives the red color to human blood.

Answer 10

The reason your veins look bluish under the skin is because that is the color of the blood until it is exposed to oxygen. (Of course venous blood is already less oxygenated than arterial blood.)