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
The Anatomy of Power in moving away from condign and towards compensatory and then conditioned power, and from personality and property towards organisation. Finally, it details what Galbraith views as the main sources of power in the modern world: government, the military, religion and the press. The Anatomy of Power The Anatomy of Power is a 1983 book by Harvard economist John Kenneth Galbraith. It sought to classify three types of power: "compensatory power" in which submission is bought, "condign power" in which submission is won by making the alternative sufficiently painful, and "conditioned power" in which submission is gained by persuasion. In short;