A&P Axial Skeleton Flashcards

Terms Definitions
Zygomatic Bone
Temporal Bone
Paranasal Sinuses Picture
Median Sacral Crest
FUNCTION-forms lower jaw
ARTICULATIONS-mandibular fossae of the temporal bones
LANDMARKS-body, alveolar process, mental protuberance, submandibular salivary gland, mylohyoid line, ramus, angle, condylar process, coronoid process, mandibular notch
FORAMINA-mental foramina, mandibular foramen
Sagittal Suture
between parietal bones
There are ____ cervical vertebrae.
cervical spine
7 neck vertebrae (concave)
The prominent feature of the C2 (axis) is the ________ (aka odonoid process)
occipital bone
FUNCTION-forms posterior and inferior surfaces of the cranium
ARTICULATIONS-parietal bones, temporal bones, sphenoid, first cervical vertebra
LANDMARKS-external occipital protuberance, external occipital crest, occipital condyles, inferior and superior nuchal lines, internal occipital crest, chondyloid fossa, posterior cranial fossa
FORAMINA-foramen magnum, jugular foramen, hypoglossal canals
Mastoid Process
Large, behind styloid (Projection inferior and posterior to external acoustic meatus).
palatine process
forms the anterior hard palate; processes meet in medial palatine suture
Temporal bone
squamous suture
The Squamous Suture is a simple joint that unites the parietal and temporal bones of the skull.
Each succeeding body of the thoracic vertebrae is (THICKER/THINNER) than the one above it.
-Right below frontal bone-For the bridge of the nose
White Bone
maxillary bones
FUNCTION-support the upper teeth, form the inferior orbital rim, the lateral margins of external nares, upper jaw, and most of hard palate
ARTICULATIONS-frontal, ethmoid, one another, all facial bones except mandible
LANDMARKS-orbital rim, anterior nasal spine, alveolar process, palatine processes, hard palate, maxillary sinuses, nasolacrimal canal
FORAMINA-infraorbital foramen, inferior orbital fissure
3 bones of the chest: manubrium (handle) / sternal angle (where handle meets body) / body (middle) / xiphoid process
Lambdoid Suture
Above Occipital bone (site of articulation of occipital bone and parietal bones).
Cervical vertebrae
transverse foramen they have extra opening to carry vertebral arteries
auditory ossicles
found in middle ear cavity; involved in sound transmission
forms posterior aspect and most of the base of the skull
The spinal nerves exit through the ______________.
intervertebral foramen
Which bone articulates with all other bones and forms part of floor and lateral walls of the eye sockets?
sphenoid bones
Air filled chamber within a bone. Make a bone lighter. Mucous membrane produces mucus that moistens and cleans the air.
What are fontanels?
These are the fibrous membranes connecting the cranial bones in the fetal skull.
zygomatic arch
made of zygomatic bones and temporal bones
*there for chewing
Vertebral Column Function
S shaped spring with 26 bones connected by intervertebral disks. Protects spinal cord, supports neck and trunk, flexibility
The pulpy medulla (inner core) of the intervertebral discs.
Nucleus pulposus.
Lumbar vertebrae
(L1-L5) Form the small of your back. L5 articulates inferiorly with the sacrum
What is a horseshoe-shaped bone with horns on it?
The Hyoid bone.
Superior Articular process
roject upward from a lower vertebra, and their articular surfaces are directed more or less backward
Parts of the temporal bone (3).
Mastoid process, styloid process, external accoustic meatus (ear-hole)
cranial floor or base
this part of the cranium contains forms the skull bottom, internally has three distinct concavities, the anterior, middle, and posterior fossae
External Occipital Protuberance
Base of occipital bone in the back (Midline prominences posterior to the foramen magnum).
How many bones in the vertebrae
26 bones
7 in cervial
12 in thoracic
5 in lumbar
sacrum (fusion of 5 sacral vertebrae)
coccyx (fusion of four bones)
What is the Lumbar Vertebrae?
They have massive block like bodies and short, hatchet-shaped spinous processes.
superior and middle nasal conchae
forms part of lateral walls of nasal cavity; increase turbulence of air flow
Where is the spinal column?
It extends form the skull to the pelvis.
What are the three parts of the sternum?
the Manubruim, body, and xiphoid process.
What is the process that makes up the Zygomatic bones?
temporal process of the zygomatic bone
What happens to result in a cleft palate?
A cleft palate forms due to failure of the palatine processes or failure of the palatine bones to form the posterior part of the hard palate.
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