Role of Metals in Living Systems

[xxpsychoxx]

Hey, can anyone direct me to information on the role of the following metals in living systems? If you can, please state specific effects and reccomendations of importance(in the body).
Zn, Mg, Fe

[Chemicalsuperfreak]

Homework question?

I'll get you started. Zinc fingers. Chlorophyll. Hemoglobin.

[xxpsychoxx]

Yep its homework. Every Wednesday my class does a chemistry lab abd are required to write up a 'school based assesment' for the following week, so most likely i may be posting here weekly. I've got all the info needed, however, thx for the help.

[nautica]

Iron is need to transport O2 in the blood.

Nautica