Keel (anatomy)
A keel (or in Latin carina), in anatomy, is a structure whose shape resembles the keel of a boat. The term may refer to:
Animal anatomy
- Keel (bird anatomy), a perpendicular extension of a bird's breastbone, to which wing muscles anchor
- Keel (slug), a morphological feature on the back of some land slugs which resembles the keel of an upturned boat
- Keel in a gastropod shell, a sharp ridge or edge at the shoulder or the center of periphery of the whorls of a snail shell
- The caudal keel in fish anatomy, a strengthening ridge at the base of the tail
- Keeled scales, reptile scales that have a ridge down the center, rather than being smooth
Human anatomy
- Carina of trachea
- Sagittal keel, a feature of the skull
Plant anatomy
- Keel (petal), the two bottom petals, below the wings, in flowers of the subfamily Faboideae of the flowering plant family Fabaceae; sometimes joined to form a structure whose shape resembles the keel of a boat
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