Keel (bird anatomy) Keel (bird anatomy) A keel or carina (plural carinae) in bird anatomy is an extension of the sternum (breastbone) which runs axially along the midline of the sternum and extends outward, perpendicular to the plane of the ribs. The keel provides an anchor to which a bird's wing muscles attach, thereby providing adequate leverage for flight. Keels do not exist on all birds; in particular, some flightless birds lack a keel structure. Historically, the presence or absence of a pronounced keel structure was used as a broad classification of birds into two orders: Carinatae (from "carina", "keel"), having a pronounced
Scientific management the rate increase, but also dismissed as insufficiently substantiated that concept the railroads were necessarily inefficient.) Taylor recognized the nationally-known term "scientific management" as another good name for the concept, and adopted it in the title of his influential 1911 monograph. The Midvale Steel Company, "one of America's great armor plate making plants," was the birthplace of scientific management. In 1877, at age 22, Frederick W. Taylor started as a clerk in Midvale, but advanced to foreman in 1880. As foreman, Taylor was "constantly impressed by the failure of his [team members] to produce more than about one-third of [what