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.
A. A. A. Multiple sclerosis, or MS, is a long-lasting disease that can affect your brain, spinal cord, and the optic nerves in your eyes. It can cause problems with vision, balance, muscle control, and other basic body functions. The effects are often different for everyone who has the disease.
One way to reduce risk factors is to live a healthy lifestyle. Risk factors for Alzheimer's disease include heart disease, high blood pressure, and stroke. Brain health is linked to heart health, and if the heart has a hard time pumping blood, the brain won't get all the blood it needs.