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| a cord or band of dense, tough, inelastic, white, fibrous tissue, serving to connect a muscle with a bone or part; sinew |
| either one of the seventh pair of cranial nerves composed of motor fibers that control muscles of the face except those used in chewing |
| parietal bone | |
| —n | |
| either of the two bones forming part of the roof and sides of the skull | |
parietal bone n.
Either of two irregularly quadrilateral bones between the frontal and occipital bones that together form the sides and top of the skull.
parietal bone
cranial bone forming part of the side and top of the head. In front each parietal bone adjoins the frontal bone; in back, the occipital bone; and below, the temporal and sphenoid bones. The parietal bones are marked internally by meningeal blood vessels and externally by the temporal muscles. They meet at the top of the head (sagittal suture) and form a roof for the cranium. The parietal bone forms in membrane (i.e., without a cartilaginous precursor); the sagittal suture closes between ages 22 and 31. In primates that have large jaws and well-developed chewing muscles (e.g., gorillas and baboons), the parietal bones may be continued upward at the midline to form a sagittal crest. Among early hominids, Paranthropus (also called Australopithecus robustus) sometimes exhibited a sagittal crest.
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