Hemoglobin is the iron-containing oxygen-transport metalloprotein in the red blood cells of most vertebrates and some invertebrates. In mammals, the protein makes up about 97% of the red blood cells' dry content, and around 35% of the total content (including water) and gives them the red colour typically seen in blood.
The iron in your blood
In the blood, their presence makes 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.
The protein hemoglobin, found in the red blood cells, is what makes blood red.
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.
oxygen is the answer