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Bones
| Term | Definition |
|---|---|
| chondrocyte | cartilage cells |
| appositional growth | occurs when chondrocytes in the deep layer of the perichondrium begin to divide and secrete additional matrix |
| ligaments | fibrous bands that help hold the various bones together into an organized skeleton |
| diaphysis | main shaftlike portion. Its hollow, cylindrical shape and the thick compact bone that composes it adapt the diaphysis well to its function of providing strong support without adding cumbersome weight. |
| epiphyses | the proximal and distal ends of a long bone |
| articular cartilage | —thin layer of hyaline cartilage that cov-ers the articular or joint surfaces of epiphyses. The resil-iency of this material cushions jolts and blows |
| periosteum | dense, white fibrous membrane that covers bone except at joint surfaces, where articular cartilage forms the covering. Many of the periosteum fibers penetrate the underlying bone and weld these two structures to each other |
| medullary cavity | a tubelike hollow space in the diaphysis of a long bone, also called a marrow cavity. In the adult the medullary cavity is filled with connective tissue rich in fat—a substance called yellow marrow |
| endosteum | a thin, fibrous membrane that lines the med-ullary cavity of long bones. The endosteum lines the spaces of spongy bone as well. Like the periosteum, the endosteum has various types of bone cells and the stem cells that pro-duce them |
| lacunae | small spaces in bone matrix that contain tissue fluid and in which bone cells lie imprisoned between the hard layers of the lamellae |
Created by:
alexis.ahrens
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