Abbreviation: AFO. Any of a class of external orthopedic appliances, braces, or splints devised to control, limit, or assist foot and ankle motion and provide leg support. Typically, orthotics are made of lightweight materials such as thermoplastics. See: illustration.
Some minerals such as calcium are needed in large quantities, while others such as zinc are only needed in trace amounts. Zinc is an essential mineral that is important for keeping your immune system strong and helps your body fight infections, heal wounds and repair cells.alcium is the most abundant mineral in your body and is found in your bones and blood. Along with the minerals phosphorus and magnesium, calcium gives your bones strength and density.
Although each mineral has its own specific function, NHS Choices notes that as a whole, minerals perform three basic functions. They help build strong bones and teeth, control the amount of fluid inside and outside of your cells, and turn the food you eat into energy your body can use.