Setting aside the notion of determining the number of individual animals on the planet for a moment, merely determining the number of species on the Earth is challenging. Science has only been able to offer estimates thus far, and totals vary greatly.
People who have early onset Alzheimer's may be in any stage of dementia â early stage, middle stage or late stage. The disease affects each person differently and symptoms will vary. If you are experiencing memory problems: 1  Have a comprehensive medical evaluation with a doctor who specializes in Alzheimer's disease.
Heart diseases can damage the coronary arteries, which provide oxygen-rich blood to the heart muscle. Heart diseases can also impair the functioning or structure of the heart and blood vessels. Coronary artery disease causes most heart attacks and is the most common form of heart disease.The types of heart disease include: Atherosclerosis is a buildup of cholesterol, calcium and blood clotting material on the walls of the arteries.The material that builds up is called plaque.eart failure is a condition in which the heart has been damaged from a heart attack or other type of heart disease. Heart valve disorder is a malfunctioning heart valve that causes abnormal stress on the heart. Myocarditis is an infection of the middle layer of the heart wall.