What element binds oxygen in red blood cells?

Question

calcium

iron

potassium

zinc

Answer 1

IRON

It's in the hemoglobin. When your blood exits your lungs, it is dark brown, essentially rust, which is caused by the iron binding with oxygen to form Iron oxides.

Answer 2

Just out of curiosity, I copied and pasted your actual question into Google and, presto, got the answer right away.

Answer 3

IRON(Fe)

Answer 4

iron from heme group of hemoglobin. totally there are 4x O2 per hemoglobin. Of course if saturation is high enough.

Answer 5

Iron...have you never heard of heamoglobin?

Answer 6

iron, it makes up hemoglobin