Question

How do breast bone help the birds during flight?

Answer 1

1. 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.
2. 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.
3. The keel dramatically increases the surface area for muscle attachment.
4. The breastbone or the keel thus helps the birds to fly.
5. It increases the surface area to attach the bones, and also provides the leverage for flight.