Orthopedic surgeons receive 5 or more extra years of training after school. 1  They specialize in the care of disorders of the bones, muscles, tendons, and ligaments. They are trained to manage joint problems with both operative and non-operative techniques.
What the Immune System Does. The immune (pronounced: ih-MYOON) system, which is made up of special cells, proteins, tissues, and organs, defends people against germs and microorganisms every day. In most cases, the immune system does a great job of keeping people healthy and preventing infections.
Proteins are macromolecules made up of amino acid building blocks. There are thousands of proteins in organisms, and many are made up of several hundred amino acid monomers. Check out the table below for some examples of proteins in your body.Lipids are macromolecules that are made up of long chains of fatty acids, or carbon rings. Important lipids in your body include cholesterol, steroid hormones, triglycerides, and phospholipids.hink of a monomer as being a brick, and a polymer, or macromolecule, as being the whole brick wall composed of the building blocks. The brick wall is composed of smaller units-the bricks-just as a macromolecule is composed of monomer building blocks.