The protein hemoglobin, found in the red blood cells, is what makes blood red.
The iron in your blood
In the blood, their presence makes blood red.
There is a substance called iron in your blood. As you probably know, when iron is exposed to oxygen, it immediately starts to rust, which rust is red. Therefore, when the iron in your blood "rusts'' so to speak, it turns your blood red.
Hemoglobin makes the red color.
oxygen makes blood red go read a science book
The protein hemoglobin, found in the red blood cells, is what makes blood red.
Red Blood...it's what makes your blood red.
Red Blood Cell
oxygen is what makes your blood red... you may not know this but when your blood is not seen it is blue
Blood is red because oxygen makes contact with it.
Your Blood
The Answer Is Circulatory System That Makes Blood Cells RED ! it is the heme part of the haemoglobin that gives blood cells their bright red colour.