Quiz 3: Teeth, Hyoid, Vertebrae, Ribs, Thorax Flashcards
Part of the tooth covered by enamel
crown
Part of the tooth that anchors the tooth in the alveolus of the mandible or maxilla
Root
Specialized hard tissue that covers the crown
Enamel
Bone-like tissue that covers the external surface of tooth roots
Cementum
The tissue that forms the core of the tooth
Dentin
The constricted part of the tooth at the junction of the crown and root
Cervix (or neck)
The line encircling the crown at the cervix, marking the most root-ward extent of the enamel
Cementoenamel
Body of the hyoid
Straddles the midline
Greater horns of the hyoid
long, thin structures that form the posterior sides of the hyoid
Lesser horns of the hyoid
small, conical eminences on the superior surface of the bone where the body and greater horns are joined
How many cervical (neck) vertebrae
7
How many thoracic (chest) vertebrae
12
How many lumbar (lower back) vertebrae
5
How many segments of sacral vertebrae
5
How many segments of the coccyx
3-5, usually 4
In the articulated vertebral column, what are the 4 distinct curves in the anterior/posterior plane
1) Cervical region (anterior curvature)
2) Thoracic region (posterior curvature)
3) Lumbar region (anterior curvature)
4) Sacrum/coccyx (very posterior curvature)
Body of the vertebrae
Spool shaped structure that constitutes the main, weight bearing part of the vertebrae
Spinous process of the vertebrae
Projects posteriorly on the midline and serves to anchor ligaments and muscles
Transverse process of the vertebrae
Found on each side of each vertebrae
Vertebral (neural) arch
Encloses the spinal cord posterior to the vertebral body
Pedicle of the vertebral arch
the short segment of the arch close to the vertebral body, attached more superiorly to the body than inferiorly
Lamina of the vertebral arch
Posterior to each pedicle, the plate like part of the arch that attaches the pedicle to the spinous process
Vertebral foramen
the hole in each vertebrae where the spinal cord passes through
Superior and inferior articular facets
for articulation with superior and inferior vertebrae
Intervertebral discs
concentric rings of fibrous cartilage
-All have transverse foramina
-Usually have bifurcated tips of spinous processes
-Obliquely oriented superior/inferior articular facets
Cervical vertebrae (C1-C7)
