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
The Anatomy of the Tongue in Cheek with the release of a "Gold Edition" of "Two Lefts Don't Make a Right...but Three Do" on the same day. The Gold Edition of this album has remixed and remastered sound is similar to "Mmhmm" (the album was remixed by the same people who mixed "Mmhmm") and it has a music video for the song "Pressing On". The last line of "Pressing On" is from "The Mary Tyler Moore Show" theme. "Maybe It's Maybeline" (deliberately misspelled, much like the band's name) refers to the popular Maybelline line of beauty products and its tag line. The Anatomy of the Tongue in