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.
Humans Could Run 40 MPH ... in Theory. Usain Bolt of Jamaica sprints to the finish to win in the men's 100 meters final during the world athletics championships at the Olympic stadium in Berlin. Humans could perhaps run as fast 40 mph, a new study suggests.