The skull is composed of 29 bones which consists of the cranium and the encounter the hyoid bone and the ear ossicles.  The 8 cranial bones enclose a cavity inside of which are the brain, three layers of protective membranes (pin mater, arachnoid, and dura mater), and many blood vessels.  Fourteen irregular bones, like the reduced and upper jaw bones, nasal bones, and cheek bones form the bony framework of the face.

The human skull, in contrast with the skulls of other animals, displays a relative decrease in the dimension of the cranium.

These are the cavities of the skull:

one.      Two cavities, or orbits, enclosing the eyes.

two.      Nasal cavity, with its two chambers separated by the septum.

3.      Oral cavity, with the jaw bones and maxillae, palatine and sphenoid bones.

four.      Cranial cavity, which contain the brain.

There are important cavities, named paranasal sinuses, in the walls of some of the skull bones adjacent to the nasal cavity.  These sinuses have a lining of ciliated mucus membrane which is continuous with that of the nasal cavity, and they drain into the nasal passageways and assist to moisten them.  The paranasal sinuses are beneficial resonating chambers for the voice, but the continuity of the membrane with that of the nose and mouth permits infectious supplies to spread rapidly by way of the a variety of passageways, as in frequent colds.  The paranasal sinuses are:

Frontal Sinuses

Ethoid Sinuses

Maxillary Sinuses

The U-shaped bone in the neck, the hyoid bone, is the only bone that does not meet with other bones to sort a joint ligaments link it in extension of the temporal bone.  Some of the muscular tissues of the tongue and mouth insert in the hyoid.

Cranium = this encloses and safeguards the brain.  It also gives attachment for numerous muscle tissue that tends to make chewing and head movements achievable.

Sinuses = this is air filled cavities in the cranial bone linked to a passageway to the nasal cavities.  It also lessens the fat of the skull and will increase the intensity of the voice by serving resonant sound chambers.

Frontal bone = this is the anterior portion of the skull above the eyes, forehead rood of the nasal cavity and roof of the orbits of the eye.  It marked by a supraorbital foramen or supraorbital notch.  It has two (two) frontal sinuses above eyes around the midline.

Parietal bones = it is the every facet of the skull posterior to the frontal bone.  It is fused in the midline along saggital suture meet frontal bone along the Coronal suture.

Occipital bone = it joins parietal bone along the Lamdiodal suture.  It varieties the back again of the skull and the base of the cranium.  It is in which the decrease portion of the foramen magnum is found—nerve fibers from the brain pass and enter the vertebral column to turn out to be part of the spinal cord.

Temporal bone = it kinds aspect of the sides of the skull and the base of the skull.  It joins parietal bone along a squamous suture. It is on the inferior margin the External Auditory Meatus is discovered which connects to the components of the ears.  It is the home of the inner ear. 

The Mastoid process is the attachment to the muscle tissue of the neck.

The Styloid approach serves as anchorage to the muscular tissues linked with the tongue and pharynx.

The Jugular Foramen accommodates the jugular vein.
Zygomatic bone kinds the prominence of the neck.

Sphenoid bone

Ethomoid bone

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