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- In the human skull, a sagittal keel, or sagittal torus, is a thickening of part or all of the midline of the frontal bone, or parietal bones where they meet along the sagittal suture, or on both bones.
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In the human skull, a sagittal keel, or sagittal torus, is a thickening of part or all of the midline of the frontal bone, or parietal bones where they meet along the sagittal suture, or on both bones.
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A bird's sternum is large and positioned under the body - flight muscles attach to this bone. The ridge of the bird's sternum is called a keel. The ribs are attached to the spine and to the sternum.
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 ( Figure 1 ).
- Jonathan Gorman
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. : an anatomical process forming a ridge (as on the sternum of a bird) : carina sense 1. b. botany : the lower part of a papilionaceous flower (as of a pea or bean plant) that consists of two fused petals, lies between the wings (see wing sense 2e (2)), and encloses the pistil and stamens.
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.
Birds flap their wings using powerful upper body muscles, which are attached to the keel, an extension of the sternum. The muscles used for the downstroke are called the pectoralis, while the supracoracoideus muscles complete the upstroke.
