parietal bone

parietal bone
either of a pair of membrane bones forming, by their union at the sagittal suture, part of the sides and top of the skull. See diag. under skull.
[1695-1705]

* * *

      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.

* * *


Universalium. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Parietal bone — Bone: Parietal bone Figure 1 : Left parietal bone. Outer surface …   Wikipedia

  • Parietal bone — The main side bone of the skull. Although the parietal bone is curved, it is considered a flat bone, as opposed to a tubular bone. It is shaped like an irregular quadrangle. It articulates (joins) with the other parietal bone in the midline, with …   Medical dictionary

  • parietal bone — noun a bone forming the central side and upper back part of each side of the skull …   English new terms dictionary

  • parietal bone — pari′etal bone n. anat. either of a pair of bones forming, by their union at the sagittal suture, part of the sides and top of the skull • Etymology: 1695–1705 …   From formal English to slang

  • parietal bone — noun either of two skull bones between the frontal and occipital bones and forming the top and sides of the cranium • Hypernyms: ↑membrane bone • Part Holonyms: ↑cranium, ↑braincase, ↑brainpan • Part Meronyms: ↑entomion, ↑ …   Useful english dictionary

  • parietal bone — noun Date: 15th century either of a pair of bones of the roof of the skull between the frontal bones and the occipital bones …   New Collegiate Dictionary

  • parietal bone — noun Either of two bones that together form the sides and top of the skull …   Wiktionary

  • parietal bone — either of a pair of bones forming the top and sides of the cranium. See: skull …   The new mediacal dictionary

  • parietal bone —   Iwi ōpe ape a …   English-Hawaiian dictionary

  • Parietal — may refer to:*Parietal lobe of the brain *Parietal bone of the skull *Parietal scales of a snake lie in the general region of the parietal bone. *Parietal cell in the stomach *Parietal pleura *Parietal pericardium*Parietal eye, third eye of some… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”