Finally the hour covering of our teeth known as the tooth enamel is formed from the actoderm germ layer as well. So all of these structures and organs and systems are formed from the actoderm germ layer these light purple cells shown in the diagram. Now let's move on to these middle red cells that make up the mesoderm germ layer. So essentially many of the different Oregon structures that are found in between these two layers are formed from the mesoderm. So that includes all the different types of muscle. So the skeletal muscle, the cardiac muscle and a smooth muscle is formed from the mesoderm.