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 evolved from system anatomies, mainly at Ericsson, since the late 1990s. Both the terminology and the methodology have differed between organizations and the difference between "system anatomy", "project anatomy", "delta anatomy" and "integration anatomy" is sometimes diffuse or non-existent. In 2004 FindOut Technologies presented a SW tool (Paipe) for managing anatomies with more properties. The company has, since then, worked to establish the term Project Anatomy. The project anatomy below is an example showing the work packages needed to develop a simple issue management system. Work packages with many dependencies are called spiders and indicate a risk. The risk may