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Skeletal System Key
Key Terms for the Skeletal System
Question | Answer |
---|---|
Skeletal System | is made of organs called bones |
Diaphysis | The long shaft of long bone |
Epiphysis | the extremities,or ends of a bone |
Medullary Canal | a cavity in the diaphysis |
Yellow marrow | mainly fat cells |
Red marrow | found in certain bones such as the vertebrae rib, sternum, humerus, and femur. |
Periosteum | the outside of bone covered with a tough membrane |
Axial Skeleton | forms the main trunk of the body and is composed of the skull |
Appendicular skeleton | forms the extremities and is composed of the shoulder girdle, arms, bones, pelvic girdle, and leg bones. |
Cranium | the spherical structure that surrounds and protects the brain |
fontonels | soft spaces of cranium of a new born |
sultures | areas where the cranial bones have join together |
sinuses | air spaces in the bones of the skull that act as resonating chambers for the voice |
foraminar | openings in the bones that allow nerves and blood vessels to enter or leave the bone |
vertebrae | the spinal column is made of 26 bones |
ribs | there are 12 pairs of ribs, they attach to the thoracic vertebrae on the dorsal surface of the body |
sternum | breastbone, the last bone of the axial skeleton |
clavicles | the shoulder or pectoral, girdle is made of two collarbones |
scapulas | shoulder bones provides attachment of the upper arm bones |
humerus | bones of each arm in the upper arm |
radius | larger bone of lower arm with as projection called the olecranan process at its upper and forming the elbow |
Carpals | eight in the wrist |
metacarplas | five in the palm of the hand |
phalanges | fourteen in fingers and fourteen in the toes |
os coxae | the pelvic girdle is made of two |
femur | one in each leg |
patella | in the kneecap in each leg |
tibia | in the lower leg in each leg |
fibula | also in the lower leg in each leg |
tarsals | seven tarsals in each leg |
metatarsals | in the instep of the foot in each leg |
joints | areas where two or more bones join together |
ligaments | connective tissue bonds |