The myelin sheath is a protective covering that surrounds fibres called axons, the long thin projections that extend from the main body of a nerve cell or neuron.This sheath is composed of protein and lipids.amaged myelin. Multiple sclerosis is an autoimmune condition where the bodyâs own immune cells attack this myelin sheath. T cells strip the myelin from the nerve fibers it protects, meaning the fibers are left exposed and uninsulated.
The London Eye has held its position as the biggest Ferris wheel in the world since 2000, reaching a whopping 135m and adding an oomph to the London skyline that has other countries salivating. The London Eye held the title as the biggest Ferris wheel in the world for six years. China was next to get in on the game. In 2006 they introduced their own wheel of fortune, Star of Nanchang, which soared 165m above the ground.
The History of the Ferris Wheel. The Ferris wheel may be one of the greatest inventions of all time. It turned 100 years old in 1993. George Washington Ferris, a civil engineer from Illinois, invented the Ferris wheel in the 1890's. The first Ferris wheel was built for the 1893 Chicago World's Fair in 1893. The total Cost of the wheel was $300,000.00. Mr. Ferris' invention was and still is the largest wheel ever built. It weighed 1,300 tons (that's about how much a herd of 2,000 dairy cows would weigh !). The Ferris wheel stood 25 stories high and held over 1,400 passengers.