Create an account
provide support with flexibility and resilience; the most abundant skeletal cartilages
contain more stretchy elastic fibers and so are better able to stand up to repeated bending
forms the long axis of the body and includes the bones of the skull, vertebral column, and rib cage
consists of the bones of the upper and lower limbs and the girdles that attach the limbs to the axial skeleton
important functions of bones
support, protection, movement, mineral and growth factor storage, blood cell formation, triglyceride storage
The cartilage present at the junction of the diaphysis and epiphyses; a remnant of the epiphyseal plate.
tufts of collagen fibers that extend from its fibrous layer into the bone matrix; secure the periosteum to the underlying bone
sites of muscle, ligament, and tendon attachment, as joint surfaces, or as conduits for blood vessels and nerves
lie at right angles to the long axis of the bone; connect the blood and nerve supply of the periosteum to those in the central canals and the medullary cavity
align precisely along lines of stress and help the bone resist stress; contain irregularly arranged lamellae and osteocytes interconnected by canliculi
mineral salts; largely calcium phosphates present as tiny, tightly packed, needle like crystals in and around collagen fibers in the extracellular matix
repair of a bone fracture
a hematoma forms, fibrocartilaginous callus forms, bony callus forms, bone remodeling occurs
functions of the facial bones
form the framework of face, contain cavities for the special sense organs of sight taste and smell, provide openings for air and food passage, secure the teeth, anchor the facial muscle of expression
function of cranial bones
enclose and protect the fragile brain and furnish attachment sites for head and neck muscles
articulates superiorly with L5 and inferiorly with the coccyx; laterally, the sacrum articulates with the two hip bones to form the pelvis
bony thorax; forms a protective cage around the vital organs of the thoracic cavity, supports the shoulder girdles and upper limbs, provides attachment points for many muscles
consists of the clavicle anteriorly and the scapula posteriorly; attaches the upper limbs to the axial skeleton and provide attachment points for many of the muscles that move upper limbs
the largest, longest bone of the upper limb; articulates with the scapula at the shoulder and with the radius and ulna at the elbow
lateral longitudinal arch
elevates the lateral part of the foot just enough to redistribute some of the weight to the calcaneus and the head of the fifth metatarsal
runs obliquely from one side of the foot to the other, following the line of the joints between the tarsals and metatarsals
allow an infant's head to be compressed slightly during birth, and accommodate brain growth in the fetus and infant
fundamental functions of joints
give skeleton mobility, hold it together, and sometimes play a protective role
joints in which articulating bones are separated by a fluid containing joint cavity; freely movable diathroses
six distinguishing features of synovial joints
articular cartilage, joint cavity, articular capsule, synovial fluid, reinforcing ligaments, nerves and blood vessels
flattened fibrous sacs lined with synovial membrane and containing a thin flim of synovial fluid
one flat bone surface glides or slips over another without appreciable angulation or rotation
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together