spleem
liver
Most of the iron in the body is hoarded and recycled by the reticuloendothelial system, which breaks down aged red blood cells. So i think its the spleen as spleen is a part of recticuloendothelial system.
Iron is part of the haemoglobin molecule. Oxygen binds with iron to be transported around the body.
Your blood. Iron is essential for your blood cells to do their job.
The glucose that the mitochondria takes in and then breaks down to form energy is in the matrix.
HEART
Iron is an important part of hemoglobin, the protein that helps your blood carry oxygen.
stomach
pancrease
any part
Iron turns you into a robot so stay out of the rain. Iron is a part of hemoglobin, which is a part of red blood cells. Hemoglobin is the part of the red blood cell that carries the oxygen. A little of the body's stored iron is also used for cellular proteins to do nessecary functions such as storing oxygen.
The bladder.