Skeletal System

cells the body has programmed to create bones

the first formation of bone

bone formation

bone-forming cells that secrete a matrix which becomes calcified

large multinucleated cells that reabsorb bone matrix

former osteoblasts that are surrounded by bone matrix and have calcified

the hard layer that generally makes up the outer layer of bones

a spongy structure; refers mostly to bone tissue

the narrow channels through which the osteocytes extend

small cavities containing mature bone cells

mature bone cells

bones whose length is greater than their width, such as the bones of the extremities

shaped more like cubes and generally found in the ankle and wrist (tarsus and carpus)

found in the cranial vault, sternum, shoulder blades and ribs. made up of a layer of marrow sandwiched between two layers of compact bone

a mix of irregularly shaped bones that do not fall into any of the other bone-type categories. Found in the face, spinal column and hips.

mostly rounded masses embedded in certain tendons and are usually related to the surfaces of joints. Included in this group are the patella (kneecap), metacarpophalangeal joints of the hands, and metatarsophalangeal joints of the toes

small bones found between suture lines of the skull where the edges of the skull bones are joined together

cavities inside a bone

rounded end of a long bone (the rounded tip)

opening or hole in a bone

small rounded projections

indentation of a bone, also called a depression

rounded bone projections

constricted end of a long bone before the head or rounded end

long or deep hole in a bone

small, smooth, and flat areas

large rounded projections

the bones of the skull, vertebral column, thoracic cage, sternum, hyoid, and ears