bones

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
• 24 vertebrae
• sacrum
• coccyx
• The vertebral column has two concave curvatures and two convex curvatures in the adult.

• Located in the neck
• All cervical vertebrae have a transverse foramen

• (first cervical vertebra)
• Transverse foramen
• vertebral foramen
• anterior arch
• posterior arch
• Note: The atlas lacks a body and spinous process

• (second cervical vertebra)
• transverse foramen
• vertebral foramen
• body
• odontoid process (dens)
• spinous process

• Last 5
• transverse foramen
• vertebral foramen
• body
• spinous process

• Located in the chest
• Thoracic vertebrae have facets for attachment to ribs.
• vertebral foramen
• body
• spinous process
• pedicle (notice the superior and inferior notches)
• facets for attachment to ribs

• Located in the lower back.
• Lumbar ver. are larger than either cervical or thoracic verte.
• vertebral foramen
• body
• spinous process
• pedicle
• 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

• manubrium
• body
• xiphoid process

• (12 pairs)
• True ribs- upper 7 pairs
• fasten to sternum by costal cartilages
• False ribs- 5 pairs; do not attach to sternum directly; last two pairs (floating ribs) do not attach to sternum at all