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46 Cards in this Set
- Front
- Back
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Axial skeleton has how many types of bones?
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5
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long bones
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longer than wide, compact and very rigid, do not bend. example is humerus
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short bones
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spongy except on the surface, wider than long, example is trapezius in wrist
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flat bones
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plates of compact bone that enclose spongy bone. example is sternum
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irregular bones
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variable, example is vertebrae
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sesamoid bones
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develop in tendon/ligament and is engulfed inside it. example is patella
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how many bones in axial system?
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80
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what bones are include in axial system?
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skull, hyoid, vertebrae, ribs, sternum, ear ossicles
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appendicular skeleton includes what bones?
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upper and lower extremities, pectoral and pelvic girdle
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skull has how many bones and what two types?
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22 bones, cranial and facial
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paranasal sinus
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mucous lined cavities in the skull
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mandible
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only moveable bone in the skull
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sutures
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immovable bones which hold skull bones together
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frontal bone
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forehead, roof of orbits, anterior cranial floor. ex black eyes
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parietal
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sides and roof of cranium
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temporal
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many pieces including temporal squama, zygomatic process, external auditory meatus, mastoid process, styloid process, manidibular fossa
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number of cranial bones
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8
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what does the cranium do?
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protects the brain, houses ear ossicles, muscle attachment of jaws and neck
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number of facial bones
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14
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name the cranial bones
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frontal, 2 parietal, 2 temporal, occipital, sphenoid, ethmoid
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2 nasal bones that are not doubled
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vomer and mandible
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zygomatic bones
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cheek bones
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lacrimal v inferior nasal conchae
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inferiors are their own bones
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pterygoid processes
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attachment site for jaw muscles
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ethmoid bone
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part of the anterior portion of the cranial floor
the medial wall of the orbits the superior portion of the nasal septum most of the superior side walls of the nasal cavity. It is a major superior supporting structure of the nasal cavity |
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concha
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turbinates for filtering and warming the air
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cleft palate
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lack of union of the 2 maxillary bones
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lacrimal bones
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part of medial wall of the orbit
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vomer
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1 bone, it is posterior part of nasal septum, divides cavity into right and left
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palatine
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L shaped bone, back part is hard palate, other part connects with orbits. sits behind the maxilla
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nasal septum
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formed by vomer, and perpendicular part of ethmoid and septal cartilage
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orbits are formed by
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7 bones in the skull, have 5 foramina
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foramen magnum
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foramen of the skull, located in occipital bone, allows inferior brain to connect with spinal cord, spinal arteries pass thru here
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optic foramen
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foramen of the skull, located in sphenoid bone, allows optic and opthalmic artery to pass thru
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mandibular foramen
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mandible
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carotid foramen
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temporal bone between greater and lesser wings, internal carotid artery passes thru
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stylomastoid foramen
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foramen of the skull, located in temporal bone between mastoid and styloid process, works with CN facial nerves and stylomastoid artery
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coronal suture
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connects frontal bone with 2 parietals
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sagittal suture
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connects the 2 parietals
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lambdoid suture
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connects 2 parietals to occipital
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squamous suture
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connects temporals to parietals
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4 fontanels
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posterior, posteriorlateral, anterior and anterolateral
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hyoid
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doesnt articulate with any other bones in the body, superior to adams apple
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vertebral column has how many vertebrae and how many regions
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26 vertebrae, 5 regions
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numbers of vertebrae for each region
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cervical=7
thoracic=12 lumbar=5 sacrum=5 fused coccyx=4 fused |
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2 parts of intervertebral discs
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inner=annulus fibrosus
outer=nucleus pulposus |
