Structure and function of the dermis in general Structure; deep part of skin; connective tissue composed of two layers function; is responsible for the structural strength and flexibility of the skin; the epidermis exchanges gases nutrients and waste products with blood vessels in the dermis
My new answer: Usain Bolt acheived a top speed of 27.28 mph or 43.90 kph in travellng the 2 fastest consecutive 60-70 & 70-80, 10m splits ever of .82 seconds. We'll leave out 4x100m splits as I don't have them for Team Jamaica's WR from Beijing.
According to the Guiness Book of World Records, the fastest a human has run is 200 m in 19.32 seconds by Michael Johnson (US) Atlanta, Georgia, July 21, 1996. This about 10.35 m/sec. However human beings travel much faster than this using animals such as horses, or while falling off buildings, or using machines such as automobiles and aeroplanes.