Bio Anthro Lab Quiz Osteology Skull

• Between frontal bone and sphenoid bone
• form
• the medial wall of the eye orbits
• the roof of the nasal cavity
• superior portion of the nasal septum

Ethmoid sinuses - made up of spiral shaped turbinates this is where air becomes warmed and humidified.

• Form the lateral and inferior portions of the nose, the inner most and inferior of the eye orbit and the anterior base of the cheek and houses upper teeth (alveolar margin)
• Palatine process - roof of the mouth

Palatine bones are posterior to the palatine process of each maxilla and the form the most posterior portion of the palate.

lines in between maxilla and temporal bone creating the anterior part of each zygomatic process or cheekbone

bones that are found in the medial portion of each eye orbit between each maxilla and the ethmoid/ A small opening in the lacrimal allows the passage of tears.

Tiny bones that are inferior to the frontal bone and form the bridge of the nose

thin sheet of bone that forms the inferior nasal septum

also called the turbinate bones, found inside the nasal cavity

• lower jawbone
• ascending ramus on each side articulates with the temporal bone at the temporomandibular joint.
• Houses teeth is the alveolar margin
• forward midline mental protuberance

• horse shoe shaped hyoid bone is not a bone of the skull. Located in the throat above the larynx. Does not articulate with any other bone.
• Important role in speech, breathing

Coronal suture - separates the frontal bone from the parietal bone

Sagittal suture - along the midline of the skull separates lef and right parietals

Lambdoial suture - separates the occipital bone from the parietal bones

Squamosal suture - separates the temporal bone from the parietal bone

• firmly anchored in the alveolar region
• four tooth types : incisors, canine, premolars, molars  2,1,2,3

mesial/distal: toward the front of the tooth row/toward the back of the tooth row

bucca/lingual: toward the cheek/ toward the tongue

incisal: the bitting edge of the anterior teeth

occlusal: the chewing surface of the premolar and molar teeth

First 7

• Atlas - ring like structure w/ concave depressions on each transverse process where the occipital condyles articulate
• Axis - vertical prominence called the odontoid processs

• costal demifacets, rib facets
• two superior articulating processes

Largest vertebrae spinous processes are short and square. They do not have transverse foramen or rib facets

• composed of 5 vertebrae fused together during adulthood.
• Fused transverse processes - Alae

composed of the ribs, sternum, and thoracic vertebrae. The sternum is composed of 3 bones: manubrium, sternal body, and xiphoid process

• 12 pairs
• articulate posteriorly w/ thoracic vertebrae and curve downward and anteriorly and connects to the sternum through cartilage.

First 7 pairs True ribs, 3 false ribs, 2 floating ribs