Bones of the skull презентация

PLAN
Bones of the skull
Cranial Bones
Cranial sutures
Facial Bones

BONES OF THE SKULL
Skull contains 22 bones (8 cranial and 14 facial). Cranial bones form the cranial cavity that surrounds and protects the brain • Facial bones form the framework of the face, support the entrances to the digestive and respiratory systems, and provide attachment points for the muscles involved in facial expression

BONES OF THE SKULL

CRANIAL BONES
Frontal (1): Forms the forehead and the roofs of the eye sockets •
Parietal (2): Form the sides and roof of the cranial cavity. •
Occipital (1): Forms the back and the base of the cranium. Contains foramen magnum.

CRANIAL BONES

Temporal (2): Form the lower sides of the cranium. Contains the external auditory meatus (ear canal) •
Sphenoid (1): Spans the width of the cranial floor. Shaped like a butterfly •
Ethmoid (1): Forms most of the bony area between the nasal cavity and the orbits. 3 parts: Cristagalli (triangular upper portion), Cribiform plate (contains olfactory foramina), and Perpendicular plate (forms part of nasal septum)

CRANIAL SUTURES
Cranial sutures • Sagittal suture: between the parietal bones
Coronal suture: between the frontal bone and the parietal bones
• Lambdoid suture: between the occipital bone and the parietal bones

FACIAL BONES
• Maxillae (2): Form the upper jaw, floor of the orbits, and roof of the mouth. Contains the upper teeth • Palatine (2): L-shaped bones behind the maxillae • Nasal (2): Form the bridge of the nose •
Lacrimal (2): Located in the medial walls of the orbits (eye sockets)

FACIAL BONES
• Zygomatic (2): Cheek bones. Joins with the temporal bone to form the zygomatic arch
• Inferior nasal conchae (2): Thin, curved bones that project into the nasal cavity
• Vomer (1): Forms part of nasal septum
• Mandible (1): Lower jaw. Articulates with the temporal bone at the temporomandibular (TMJ) joint. Contains the lower teeth and mental foramina