Keel (bird anatomy)

src: heritance.me

A keel or carina (plural carina) in the anatomy of the bird is an extension of the sternum (sternum) that runs axially along the midline of the sternum and extends outward, perpendicular to the plane rib. The aisle provides an anchor attached by the bird's wing muscles, thus providing adequate leverage to fly. Keels do not exist in all birds; in particular, some non-flying birds do not have a fixed structure.

Historically, the presence or absence of a pronounced hull structure is used as a broad classification of birds into two orders: Carinatae (from carina , "keel"), has a pronounce paid; and ratites (from ratis , "rafts" - referring to the flatness of the sternum), having a fine keel structure or lacking at all. However, this classification is not used because evolutionary research has shown that many non-flying birds have evolved from flying birds. The current definition of Carinatae now includes all the remaining birds.

Video Keel (bird anatomy)

See also

• Skeleton bird
• Ornithology

Maps Keel (bird anatomy)

References

• Cummins, Jim (April 1, 1996). "Flight Anatomy". Retrieved January 31, 2005.
• Ramel, G. "Anatomy of Birds". Earth-Life Web Productions. Retrieved January 31, 2005.

Source of the article : Wikipedia