Multiple sclerosis (MS) is an autoimmune disease that affects the central nervous system. With multiple sclerosis, the brain has difficulty getting messages to the rest of the body. Though we know relatively little about multiple sclerosis, research into its causes and possible treatments is rapidly developing.
Definition of gut - the stomach or belly, used in reference to a feeling or reaction based on an instinctive emotional response rather than considered Definition of gut - the stomach or belly, used in reference to a feeling or reaction based on an instinctive emotional response rather than considered dictionary thesaurus
Definition of heart for Students. 1  1 : a hollow muscular organ of the body that expands and contracts to move blood through the arteries and veins. 2  2 : something shaped like a heart a Valentine's heart. 3  3 : a part near the center or deep into the interior They reached the heart of the desert.