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
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