Summary You will be able to learn the entire osteology of the head and thorax in an easier way.

Skull
The cranium(8) (neurocranium)
 calvaria the roof frontal, occipital and two parietal bones
 calvaria the skallcap, parietal, frontal occipital bone

face skeleton (vicerocarnium) supports the soft tissues of the face,
 zygomatic (2)  cheek bones
 lacrimal  the smallest bone of the face, the form part of the medial wall of the
orbit
 nasal (2) two slender bones.
 Inferior nasal conchae (2)
 Palatine(2)  forms the hard palate
 Maxilla (2)
 Vomer
 Mandibular  articulates with base of the cranium of temporamandibular joint

Sutures they are immovable, and fuse completely around the age of 20
The main sutures in adulthood:
 Coronal suture frontal bone and two parietal bones
 Sagittal suture both parietal bone
 Lambdoid suture occopital and two parietal bone


Paranasal sinuses air-filled, conterbute to humidifying of the inspired air, and
reduce the weight of the skull.
 Maxillary sinuses largest, thin walls which are often penerated
It drains into the nasal cavity of the hiatus semilunaris, underneath the frontal sinus
opening.
 Superior border  bony orbit
 Inferior border maxillary alveolar bone
 Medial border nasal cavity
 Anterior border cheekbones
 Frontal sinuses found under the forehead, drain into the frontonasal duct

 Sphenoid sinuses found posteriorly, are large and irregular

 Ethmoidal sinuses there are three ethmoidal sinuses;
Ethmoidal air cells may be grouped together, on each side of midline

 Anterior  hiatus semilunaris
 Middle ethmoidal bulla
 Posterior  superior