Skull

craniumcranialhuman skullskullssupratemporal fenestrapostfrontaltemporal fenestraesupratemporalcraniamandibular fenestra
The skull is a bony structure that forms the head in vertebrates.wikipedia
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Neurocranium

braincasebrain casecranial bones
In humans, these two parts are the neurocranium and the viscerocranium or facial skeleton that includes the mandible as its largest bone.
In human anatomy, the neurocranium, also known as the braincase, brainpan, or brain-pan is the upper and back part of the skull, which forms a protective case around the brain.

Facial skeleton

facial bonesfacial boneviscerocranium
In humans, these two parts are the neurocranium and the viscerocranium or facial skeleton that includes the mandible as its largest bone.
The facial skeleton comprises the facial bones that may attach to build a portion of the skull.

Cranial cavity

intracranialcranialintracranial space
It supports the structures of the face and provides a protective cavity for the brain.
The cranial cavity, also known as intracranial space, is the space within the skull.

Vertebrate

Vertebratavertebratesvertebral
The skull is a bony structure that forms the head in vertebrates.
Hagfish do, however, possess a cranium.

Frontal bone

frontalfrontalsfrontal bones
In some animals such as horned ungulates, the skull also has a defensive function by providing the mount (on the frontal bone) for the horns. The skull roof is formed of a series of plate-like bones, including the maxilla, frontals, parietals, and lacrimals, among others.
The frontal bone is a bone in the human skull.

Fossa (anatomy)

fossafossaedepression
The skull is made up of a number of fused flat bones, and contains many foramina, fossae, processes, and several cavities or sinuses.

Skull roof

skull tableskull roofscranial roof
Bony fishes have additional dermal bone, forming a more or less coherent skull roof in lungfish and holost fish. The skull roof is formed of a series of plate-like bones, including the maxilla, frontals, parietals, and lacrimals, among others.
The skull roof, or the roofing bones of the skull, are a set of bones covering the brain, eyes and nostrils in bony fishes and all land-living vertebrates.

Head

cephalicheadsCephal
The skull is a bony structure that forms the head in vertebrates.
The human head is an anatomical unit that consists of the skull, hyoid bone and cervical vertebrae.

Flat bone

flatflat bonesbasal plate
The skull is made up of a number of fused flat bones, and contains many foramina, fossae, processes, and several cavities or sinuses.
These bones are expanded into broad, flat plates, as in the cranium (skull), the ilium (pelvis), sternum and the rib cage.

Bone

cortical bonebone tissuecancellous bone
In humans, these two parts are the neurocranium and the viscerocranium or facial skeleton that includes the mandible as its largest bone. The skull is a bony structure that forms the head in vertebrates.
Intramembranous ossification mainly occurs during formation of the flat bones of the skull but also the mandible, maxilla, and clavicles; the bone is formed from connective tissue such as mesenchyme tissue rather than from cartilage.

Sinus (anatomy)

sinussinusescavity
The skull is made up of a number of fused flat bones, and contains many foramina, fossae, processes, and several cavities or sinuses.
Most individuals have four paired cavities located in the cranial bone or skull.

Parietal bone

parietalparietalsparietal bones
The skull roof is formed of a series of plate-like bones, including the maxilla, frontals, parietals, and lacrimals, among others.
The parietal bones are two bones in the skull which, when joined together at a fibrous joint, form the sides and roof of the cranium.

Vomer

vomerine teethvomer bonevomers
The upper jaw is formed from the pterygoids and vomers alone, all of which bear teeth.
The vomer is one of the unpaired facial bones of the skull.

Temporal bone

temporalPetrous ridgetemporals
The various separate bones that compose the temporal bone of humans are also part of the skull roof series.
The temporal bones are situated at the sides and base of the skull, and lateral to the temporal lobes of the cerebral cortex.

Dermal bone

dermalmembrane bonedermal bones
Bony fishes have additional dermal bone, forming a more or less coherent skull roof in lungfish and holost fish.
A dermal bone or membrane bone is a bony structure derived from intramembranous ossification forming components of the vertebrate skeleton including much of the skull, jaws, gill covers, shoulder girdle and fin spines rays (lepidotrichia), and the shell (of tortoises and turtles).

Foramen

foraminaholehollows
The skull is made up of a number of fused flat bones, and contains many foramina, fossae, processes, and several cavities or sinuses.
The skulls of vertebrates (including humans) have foramina through which nerves, arteries, veins and other structures pass.

Occipital bone

occiputoccipitalbasioccipital
The base of the cranium is formed from a ring of bones surrounding the foramen magnum and a median bone lying further forward; these are homologous with the occipital bone and parts of the sphenoid in mammals.
The occipital bone is a cranial dermal bone and the main bone of the occiput (back and lower part of the skull).

Sphenoid bone

sphenoidbasisphenoidpresphenoid
The base of the cranium is formed from a ring of bones surrounding the foramen magnum and a median bone lying further forward; these are homologous with the occipital bone and parts of the sphenoid in mammals.
It is situated in the middle of the skull towards the front, in front of the basilar part of the occipital bone.

Endocranium

endocranialendocraniainner cranium
It is overlaying the endocranium, corresponding to the cartilaginous skull in sharks and rays.
The endocranium in comparative anatomy is a part of the skull base in vertebrates and it represents the basal, inner part of the cranium.

Foramen magnum

basionopisthionforamen occipitale magnum
The base of the cranium is formed from a ring of bones surrounding the foramen magnum and a median bone lying further forward; these are homologous with the occipital bone and parts of the sphenoid in mammals.
The foramen magnum (great hole) is a large oval opening (foramen) in the occipital bone of the skull in humans and many other animals.

Quadratojugal bone

quadratojugalquadratojugalsquadratojugal bones
The quadratojugal is a cranial bone that is present in many tetrapods and their close relatives.

Antorbital fenestra

antorbital fossaantorbitalnasoantorbital fenestra
An antorbital fenestra (plural: fenestrae) is an opening in the skull that is in front of the eye sockets.

Vertebra

vertebraeneural spineneural arch
Finally, the skull tapers towards the rear, where the foramen magnum lies immediately above a single condyle, articulating with the first vertebra.
The atlanto-occipital joint allows the skull to move up and down, while the atlanto-axial joint allows the upper neck to twist left and right.

Synapsid

synapsidsSynapsidamammal-like reptile
The earlier amniotes of the Carboniferous did not have temporal fenestrae but two more advanced lines did: the synapsids (mammal-like reptiles) and the diapsids (most reptiles and later birds).
They are easily separated from other amniotes by having a temporal fenestra, an opening low in the skull roof behind each eye, leaving a bony arch beneath each; this accounts for their name.

Rostrum (anatomy)

rostrumrostralrostra
The most anterior part of the cranium includes a forward plate of cartilage, the rostrum, and capsules to enclose the olfactory organs.
In mammals, the rostrum is that part of the cranium located in front of the zygomatic arches, where it holds the teeth, palate, and nasal cavity.