A term indicating that a point or region lies nearer to the frontal surface of the body. The term VENTRAL is sometimes used synonymously.
A term indicating that a point or region lies nearer the rear surface of the body. The term DORSAL is sometimes used synonymously.
A term indicating a point or region which is nearest the point of central attachment. LONG BONES.
A term indicating a point or region which lies farthest from the point of central attachment. LONG BONES.
A point or region which lies above another point or region in the normal articulated position.
A point or region which lies below another point or region in the normal articulated position.
Any plane passing longitudinally through the body. Divides the body into two equal parts of right and left = mid-sagittal plane.
A large process or eminence. Larger areas on bones where muscle attaches; rough. (EX: proximal humerus)
thin membrane that covers a bone; richly supplied with nerve fibers, lymphatic vessels and blood vessels. These enter the bone of the shaft via a nutrient foramen. connected to the bone matrix via strong strands of collagen
bone forming cells; new bone that form and lay down in part of bone that needs it. Synthesize and secrete collagen fibers and other organic components of bone matrix.
Initiate calcification process.
mature bone cells; osteoblasts that have become trapped by secretion of matrix; responsible for maintaining bone tissue
large cells that resorb or break down bone matrix, releasing calcium ions into the blood. Concentrated in the endosteum
Organic Bone Matrix
1/3 of bone by weight; several materials that are secreted by the osteoblasts. EX: collagen fibers for resilience and resistance.
Inorganic Bone Matrix
2/3 of bone by weight; 2 salts = 1)calcium phosphate 2)calcium hydroxide in interaction hydroxyapatite; smaller amounts of magnesium, fluoride, and sodium (These minerals give bone its characteristic hardness and the ability to resist compression)
expanded ends of long bones; thin layer of compact bone covering an interior of spongy bone
thin hyaline cartilage layer that covers epiphyses of bones in synovial joints; cushions bone and decrease friction
thin layer, internal bone surfaces covered; covers trabeculae in marrow and lines the canals that pass through compact bone
HAVERSIAN SYSTEM. Structural unit of compact bone consisting of a central canal, called the haversian canal, surrounded by a number of concentric rings of bony matrix called lamellae.