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
Project anatomy Project anatomy A project anatomy (also integration anatomy or organic integration plan) is a tool for integration planning that visualizes dependencies between work items in development projects. It is mainly used in incremental development and Integration Driven Development projects. The project anatomy has evolved from the system anatomy and in its purest form the work items (called "work packages") reflect the development of system capabilities. Often a more pragmatic approach is taken, though, where work packages may contain other items with important dependencies as well, e.g. HW deliveries for embedded systems. Benefits: Limitations: History of system anatomies Project anatomies have