Though similar to tendons, ligaments connect bone to bone and help to stabilize joints they surround. They are composed mostly of long, stringy collagen fibers that create bands of tough, fibrous connective tissue.
An electron is a negatively charged subatomic particle. It can be either free (not attached to any atom), or bound to the nucleus of an atom. Electrons in atoms exist in spherical shells of various radii, representing energy levels. The larger the spherical shell, the higher the energy contained in the electron.
What you should know about Electricity â¢ Electrons form a part of every atom. Some electrons can free themselves from the atom. â¢ An electron is an invisible negatively charged sub-atomic particle. â¢ Because it is negatively charged an electron can move towards a positive charge.