A red blood cell can hold approximately 200,000 heme molecules. Each heme molecule can bind up to 4 iron atoms. So about 800,000 iron atoms is how much each red blood cell can hold.
A red blood cell can hold approximately 200,000 heme molecules. Each heme molecule can bind up to 4 iron atoms. So about 800,000 iron atoms is how much each red blood cell can hold.