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
My Name Is My Name really, really want to do…[my approach to the mixtape is] not about more of a creative [decision], I just think it's about more of what I want to hear for myself and what my fans want to hear. They want to hear lyrics, they want to hear street [music]…it's just the whole street life perspective." On December 5, 2012, the first song released from the mixtape, "Blocka", which features guest vocals by Popcaan and GOOD Music's Travi$ Scott. The reggae-inspired track was produced by Young Chop. The music video was released on December 10, 2012. The second song was, "Millions",