Week 3-Iron..boring but necessary Trans. element

I know we are supposed to choose an obscure element, but I don't know a whole lot about this element, and I am interested in elements that are essential to the functioning of the human body. Iron necessary for many bacteria, plants, and animals. It is a part of many proteins and enzymes and is essential for red blood cells. With too little iron, women may become anemic. Too much iron may be toxic. Amazing how the body tries to control this balance.