Myocarditis is a disease marked by the inflammation of the heart muscle known as the myocardium â the muscular layer of the heart wall. This muscle is responsible for contracting and relaxing to pump blood in and out of the heart and to the rest of the body. When this muscle becomes inflamed, its ability to pump blood becomes less effective.
Line Symmetry. shape has line symmetry when one half. of it is the mirror image of the other half. Symmetry exists all around us and many people see it as being a thing of beauty. Symmetry is...
A line of symmetry can be thought of as the line where you could cut a shape (or a line or any object) and it would look the exact same on both sides. An example of a shape wi â¦ th exactly two lines of symmetry would be a rectangle.   A square also has at least two lines of symmetry, but it actually has four total. 3 people found this useful.