Organization of the skeletal system

concentric lamellae

concentric bony layers around central canals

osteon (haversian systems)

rings of concentric thin plates (lamellae)

central (haversian) canals

central channel containing blood vessels, lymphatics, and nerves

lacunae

small spaces between lamellae

perforating (volkmann’s) canals

channels that pierce the central canals horizontally, contain neurovascular bundles

interstitial lamellae (systems)

remnants of lamellae not circling the central canal

canaliculi

small diffusion channels for nutrient and gas exchange

foramen examples

optic foramen, foramen magnum, mental foramina

fissure examples

superior and inferior orbital fissures

meatus/canal examples

external auditory meatus

fossa examples

mandibular fossa, glenoid fossa

process examples

coronoid process (mandible), styloid process (temporal bone), spinous process (vertebra)

tubercle examples

rib tubercle, conoid tubercle of clavicle

facet examples

articular facets (vertabra)

angle examples

mandibular angle, scapular angles

condyle examples

occipital condyles, mandibular condyle (condylar process)

spine examples

anterior superior iliac spine (ASIS), anterior inferior iliac spine (AIIS)

tuberosity example

ischial tuberosity, iliac tuberosity