Keel (bird anatomy) keel; and ratites (from "ratis", "raft" — referring to the flatness of the sternum), having a subtle keel structure or lacking one entirely. However, this classification has fallen into disuse as evolutionary studies have shown that many flightless birds have evolved from flighted birds. The current definition of Carinatae now includes all extant birds. 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
The Anatomy of the Tongue in Cheek The Anatomy of the Tongue in Cheek The Anatomy of the Tongue in Cheek (often shortened to Anatomy) is the second full-length album released by the Christian rock band Relient K. It was released on August 28, 2001, and peaked at No. 158 on the "Billboard" 200. On June 26, 2006, the album was certified Gold by the RIAA for sales in excess of 500,000 units in the United States. The cover of the original release is similar to that of the 1999 Ramones release "". The album continues the band's liberal use of pop culture references (such as the