Chapter 7: Axial Skeleton Flashcards
How many bones are in the body?
206
How many are in the axial skeleton?
80
How many are in the appendicular skeleton?
126
How many bones are associated with the skull?
29
How many bones are in the thoracic cage?
25
How many bones are in the vertebral column?
26
Skull
- Consists of the cranium and the bones of the face
- Encloses the cranial cavity
What do the facial bones do?
Surround and protect the entrances to the respiratory and digestive tracts
Sutures of the skull
- Lambdoid
- Coronal
- Sagittal
- Squamous
Lambdoid Suture
Attaches/separates the occipital bone from the two parietal bones
Coronal Suture
Attaches the frontal to the two parietal bones
Sagittal Suture
- Located between the two parietal bones
- Extends from the lambdoid to coronal suture
Squamous
The boundary between the temporal and the parietal bone on either side of the skull
Which cranial bones articulate with the sphenoid bone?
All of them
Which cranial bones have sinuses?
- Frontal
- Sphenioid
- Ethmoid
Which facial bone is the largest?
Largest facial bones are in the maxillae
Maxillae
Forms the upper jaw and most of the hard palate
Palatine bones
- Small āLā shaped bones
- Forms the posterior hard palate and floor of the nasal cavity
Nasal bones
- Superior border of external nares
- Forms the bridge of the nose
Vomer
Inferior portion of the nasal septum
Zygomatic bone
Temporal process articulates with zygomatic process of temporal bone
Lacrimal bones
- Smallest bones of the face
- Sit medially in orbit
Mandible
- Only moveable facial bone
- Bone of the lower jaw
Hyoid
- Suspended by stylohyoid ligaments
- Connects from the mastoid process (temporal bone) to the lesser horn (hyoid)
- Supports the larynx
