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
Anatomy for Beginners Anatomy for Beginners Anatomy for Beginners is a television show created by Gunther von Hagens. In this 4-part series, Dr von Hagens and Professor John Lee demonstrated the anatomical structure and workings of the body. The 4 episodes ("Movement", "Circulation", "Digestion" and "Reproduction") were screened in the United Kingdom on Channel 4 in 2005. The show features public anatomy demonstrations with the use of real human cadavers and live nude models (for Surface Anatomy and Surface Markings), carried out at Gunther von Hagens' "Institute for Plastination" in Heidelberg, Germany. Dr von Hagens’ public demonstrations are not formal anatomy dissections performed