Question

What is at the center of a red blood cell?

Plasma
Iron
Copper
Carbon
dioxide

Answer 1

Iron!

Step-by-step explanation:

There is haemoglobin, an iron complex in the middle of a red blood cell, which helps the red blood cell carry oxygen around the body!

Hope that helps!

Answer 2

Answer: Iron

Step-by-step explanation:

hemoglobin: The iron-containing substance in RBCs that transports oxygen from the lungs to the rest of the body. It consists of a protein (globulin) and haem (a porphyrin ring with an atom of iron at its center).

Hope This Helps! :P