Igneous rocks are formed from the solidification of molten rock material. There are two basic types. Intrusive igneous rocks crystallize below Earth's surface, and the slow cooling that occurs there allows large crystals to form. Examples of intrusive igneous rocks are diorite, gabbro, granite, pegmatite, and peridotite.
Systemic sclerosis or systemic scleroderma is an autoimmune or connective tissue disease. It is characterized by thickening of the skin caused by accumulation of collagen, and by injuries to the smallest arteries.ystemic sclerosis or systemic scleroderma is an autoimmune or connective tissue disease. It is characterized by thickening of the skin caused by accumulation of collagen, and by injuries to the smallest arteries.
Systemic scleroderma is the most serious form of the disease, can affect the skin, muscles, joints, blood vessels, lungs, kidneys, heart and other organs. There are two major forms of systemic scleroderma: limited cutaneous systemic sclerosis (also called CREST syndrome) and diffuse cutaneous systemic scleroderma.