1. The skull The skull is composed of two parts: 1. Cranium
2. Facial skeleton

2. Sutures

3. Frontal Coronal suture Sagittal suture Parietal Lambdoid suture
Anterior
Coronal suture
Frontal
Sagittal suture
Parietal
Lambdoid suture
Occipital
Parietal foramen
Posterior

4. Norma verticalis (superior view)
Bone forming:
- Frontal bone
- Parietal bone
- Squamous part of occipital bone

5. Norma verticalis (cont.)
Sutures seen:
- Coronal suture,
- Sagittal suture,
- Lambdoid suture,

6. Bregma
Ant.fontanell
Lambda
Post.fontanell

7. Norma occipitalis (posterior view)
There are the following bones:
- Squamous part of occipital bone.
- Parietal bones, separated from the occipital by the lambdoid suture.
- Mastoid part of temporal bone, on each side of the squamous part of occipital, separated by the occipitomastoid suture.

8. Parietal Occipital Sup.&inf.nuchal lines Ext.occipital protuberence
Ext.occipital crest
Mastoid

10. Norma occipitalis

11. Supra-orbital foramen Infra-orbital foramen
Frontal
Nasal
Maxilla
Zygomatic
bone
Supra-orbital foramen
Infra-orbital foramen
Ant.nasal spine

16. Norma frontalis (cont.)

17. Orbit It is a pyramidal shaped space with its apex directed backwards.
Its base is directed forwards at the orbital openings.
Its long axis is directed forwards and laterally.
It has a roof, a floor, a medial wall and a lateral wall.
- Lacrimal fossa: It is a depression in the anterior and lateral part of the roof.
- Optic canal: It is a foramen in posterior part of the roof.