Keel (bird anatomy) keel; and ratites (from "ratis", "raft" — referring to the flatness of the sternum), having a subtle keel structure or lacking one entirely. However, this classification has fallen into disuse as evolutionary studies have shown that many flightless birds have evolved from flighted birds. The current definition of Carinatae now includes all extant birds. 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
The Anatomy Lesson (Roth novel) of nostalgia and ambition, Zuckerman resolves to return to the University of Chicago, his alma mater, in order to pursue medical school. "The Anatomy Lesson" is the least well-received of the Zuckerman trilogy "Zuckerman Bound", though the book was a finalist for the National Book Critics Circle Award and the National Book Award. In "The Observer" in 1984, Martin Amis wrote, "'The Anatomy Lesson' may be the third and final installment of the Zuckerman trilogy, but it is also Roth's second consecutive novel about what success is like. Such fixity!... He has now written two autobiographical novels about the consequences