<P> 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 . </P>
<P> 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 . </P>
what part of a chicken is the keel
what part of a chicken is the keel
an extension of the sternum
an extension of the sternum