Card Set Information
(28) skull bones, and sutures
joints between the skull bones
down the middle
Across but on the front (anterior)
Across but on the back of the skull (posterior)
Above each ear
In fetal skull, membranous areas where fusion of skull bones has not yet occurred. The fontanels are commonly known as "soft spots". They allow some compression of the skull during birth.
where coronal and sagittal sutures meet; diamond shaped; largest of fontanels; usually closes by 1 1/2 years age.
where sagittal and lambdoidal sutures meet
Where coronal and squamous sutures meet; paired
Where squamous and lambdoidal sutures meet; paired
Actual spaces within bones
Above the medial portion of the eyebrows; torso #52
within ethmoid bone; torso #53 (next 6)
within the sphenoid bone; torso #54 (last)
mastoid process (bump), styloid process (pointy), zygomatic process (part of the side of the cheek), external auditory meatus (ear canal), mandibular fossa (depression that lower jaw fits into)
foramen magnum, occipital condyles
crista galli, cribriform plate, perpendicular plate, superior conchae, middle conchae
rumus, coronoid process, mandibular condyle (condyloid process), mental foramen
malleus, incus, stapes
the only bone in the body which does not articulate with any other bone; suspended from styloid processes; a muscle of the tongue and muscles of floor of mouth attach to hyoid
26 bones total
The vertebral column has two concave curvatures and two convex curvatures in the adult.
(7) Cervical Vertebrae
Located in the neck
All cervical vertebrae have a transverse foramen
(first cervical vertebra)
: The atlas lacks a body and spinous process
(second cervical vertebra)
odontoid process (dens)
Thoracic Vertebrae (12)
Located in the chest
Thoracic vertebrae have facets for attachment to ribs.
pedicle (notice the superior and inferior notches)
facets for attachment to ribs
Lumbar Vertebrae (5)
Located in the lower back.
Lumbar ver. are larger than either cervical or thoracic verte.
Disks of fibrous cartilage are located between the bodies of the vertebrae. Adjacent vertebral foramina form the vertebral canal which surrounds the spinal cord.
fromed by fusion of 5 sacral vertebrae
fromed from small fused vertebrae
- upper 7 pairs
fasten to sternum by costal cartilages
5 pairs; do not attach to sternum directly; last two pairs (floating ribs) do not attach to sternum at all