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Skeletal System Key

Key Terms for the Skeletal System

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
Created by: Sergiosaurs