A keel or carina (pl.: 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.

May 27, 2024 · A keel is a projection on the sternum made from bone that serves as an anchor for the wing muscles that allow birds to fly. The keel is a bone extension runs perpendicular to the structure of the sternum and the ribs. The bony structure is necessary for birds to take flight, but not all birds with them can fly.

Aug 15, 2018 · In birds, the sternum exists as a large fused structure called the keel. Unlike mammals, birds do not have a diaphragm; during inspiration they rely on the external intercostal and levator costarum muscles which move the ribs laterally and the sternum cranio-ventrally ( …

axial skeleton, the part of the bony structure of the body that consists of the bones of the skull, the vertebral column, and the rib cage. The axial skeleton serves primarily to support and protect the heart, lungs, and central nervous system, which is made up of the brain and spinal cord.

A distinctive bulge or ridge at the base of the tail of whales and dolphins, just in front of the flukes [1]. A term for the longitudinal ridge or plate of bone on the underside of a bird's sternum, or breastbone, sometimes called the carina [2] . The keel of the breastbone separates two masses...

Jul 8, 2023 · Keeled scales refer to reptile scales that have a distinctive ridge down the center, giving them a rough texture rather than being entirely smooth. Sometimes the ridge is only down the center of the scale, while other times it extends to the tip.

A keel or carina 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.

…of clupeiform fishes forms a keel, the function of which is widely considered to be an adaptation for removing the sharp shadow that would be created below the central part of the body by top lighting, were the fish cylindrical. Prevention of such a …

In bird anatomy, the Keel is an extension of the breastbone ( sternum ). The keel provides an anchor to which a bird's wing muscles attach, thereby providing adequate leverage for flight. Not all birds have keels, in particular flightless birds lack a keel structure.