Module 2 (Bones of the Axial Skeleton) Flashcards
(54 cards)
How many bones does the skull have and what are the 2 sets of bones make up the skull
22 bones
Cranial bones and Sutures
What bones make up the cranium
Frontal
Parietal
Temporal
Occipital
Sphenoid
Frontal bone
Single bone, forms the forehead and roof of orbits (eye sockets)
Parietal bones
Paired, form superior and lateral surfaces of skull
Temporal bones
Paired, form lateral and inferior walls of skull
3 landmarks of temporal bones
Zygomatic process of the temporal bone
External auditory meatus
Mastoid process
Occipital bone
Single, forms posterior wall and base of skull
What articulates with the first bone of the neck
Condyles
Sphenoid bone
Single, known as the “keystone” of skull as it joins cranium and facial bones by attaching with almost every other bone of the skull
What are sutures
Attachments or articulations between the flat bones of the skull
What are the 4 sutures
Coronal
Sagittal
Lambdoid
Squamous
Coronal
Junction between frontal and parietal bones
Sagittal
Junction between parietal bones
Lambdoid
Junction between occipital and parietal bones
Squamous
Junction between temporal and parietal bones
What is the cranial vault
Dome-shaped bony roof of skull that encases the brain
Sometimes called skullcap
What is the cranial base
Floor of the cranium and consists of 3 fossae
What is a fossa
Depression in a bone
3 fossae in the cranial base
Anterior cranial fossa
Middle cranial fossa
Posterior cranial fossa
What are the facial bones of the skull
Maxillary bones (maxillae)
Nasal bones
Zygomatic bones
Mandible
Maxillary bones
Paired, upper jaw bones
Nasal bones
Paired, articulate with frontal bone, form bridge of nose
Zygomatic bones
Paired, form the cheekbones
Feature of the zygomatic bones
Temporal process, which articulates with the zygomatic process of the temporal bone to form the zygomatic arch
