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At the lower part of the acetabulum is the acetabular notch, which is continuous with a circular depression, the acetabular fossa, at the bottom of the cavity of the acetabulum. The rest of the acetabulum is formed by a curved, crescent-moon shaped surface, the lunate surface, where the joint is made with the head of the femur.
Among others, most bones forming the outer surface of the skull and lower jaws are dermal bones. In contrast, endochondral bone is formed from a cartilaginous precursor, which ossifies (turn into bone). [1] braincase The braincase is the part of the skull housing the brain.
The acetabulum (hip joint) was formed by all three hip bones, as in other dinosaurs, though in Sarahsaurus the ischium contributed less than half as much as the pubis. The pubis was unique in having two separate openings, the obturator foramen and the pubic foramen; the latter was lacking in most other archosaurs .
In flatworms, acetabulum is the ventral sucker situated towards the anterior part of the body, but behind the anterior oral sucker. It is composed of numerous spines for penetrating and gripping the host tissue. The location and structure of the acetabulum, and the pattern of the spine alignment are important diagnostic tool among trematode ...
The skull roof is formed of a series of plate-like bones, including the maxilla, frontals, parietals, and lacrimals, among others. It is overlaying the endocranium, corresponding to the cartilaginous skull in sharks and rays. The various separate bones that compose the temporal bone of humans are also part of the skull roof series.
Like other reptiles, the pelvis of poposauroids is formed by three plate-like bones: the ilium which lies above the acetabulum (hip socket), the pubis which is below and in front of the acetabulum, and the ischium which is below and behind the acetabulum. The ilium is a large, complex bone, with a forward-pointing (preacetabular) process, a ...
Anatomical terms of bone [edit on Wikidata] The base of skull, also known as the cranial base or the cranial floor, is the most inferior area of the skull.
the membranous part, consisting of flat bones, which surround the brain; and; the cartilaginous part, or chondrocranium, which forms bones of the base of the skull. [3] In humans, the neurocranium is usually considered to include the following eight bones: 1 ethmoid bone; 1 frontal bone [5] 1 occipital bone; 2 parietal bones; 1 sphenoid bone; 2 ...