Is this really true? About blood?!

Bollocks. Blood is red, inside or outside the body. Oxygenated blood inside arteries is a bright red, deoxygenated blood inside veins is a deep dark red.

Haemoglobin is the red pigment in red blood cells that gives blood its colour. Blood is not blue. Veins APPEAR blue because they contain the dark deoxygenated blood.

RN

There is no blue blood in the human body. In anatomy pictures, the peripheral veins are colored blue to help visualize the difference between oxygenated and de-oxygenated blood. The blue colored veins is the de-oxygenated blood coming from the tissues of the body.The actual color difference is that the oxygenated blood will appear bright red while the de-oxygenated blood is more of a dull red.

I forgot to mention that this comes from my anatomy book.

One of the jobs of blood is to carry oxygen to the cells (which it picks up from the lungs). Blood leaving the lungs (in veins) and in arteries leaving the heart (before it has delivered the oxygen to the cells) is quite red. Blood on the other half of the journey is rather blue.

yeah, blood turns red when its outside because it soaks the oxygen from the air, Blue blood-low amount of oxygen, Red blood-high amount of oxygen

Yep, the blood reacts with the oxygen and turns it red. Thats why your veins are blue :) x

Yeah, that seems right.