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
Journal for the Scientific Study of Religion the category "Sociology". Journal for the Scientific Study of Religion The Journal for the Scientific Study of Religion ("JSSR") is a quarterly peer-reviewed academic journal published by Wiley-Blackwell in the United States of America under the auspices of the Society for the Scientific Study of Religion, dedicated to publishing scholarly articles in the social sciences, including psychology, sociology and anthropology, devoted to the study of religion. It is not a theology journal, as its publications tend to be empirical papers in the aforementioned disciplines, rather than papers assessing the truth or falsity, or otherwise attempting to clarify, theological doctrines. However,