A&P Unit 2 - The Skeletal System - Study Guide Definitions

tiny canals, connect the cellular processes of the osteocytes to each other and to the Haversian blood vessels

synonymous with trabecular bone or spongy bone, is one of two types of osseous tissue that form bones

a subordinate or accessory part. A side branch, as of a blood vessel or nerve

synonymous with cortical bone, consists of closely packed osteons or haversian systems and forms the extremely hard exterior of bones. Made of hydroxyapatite (mineral composed of calcium and phospate) like spongy bone,

Connective tissue membrane lining internal bone surface or medullary cavity.

the support, or point of rest, on which a lever turns in moving a body.

are a series of tubes around narrow channels formed by lamellae. This is the region of bone called compact bone. Osteons are arranged in parallel to the long axis of the bone. The Haversian canals surround blood vessels and nerve cells throughout the bone and communicate with osteocytes in lacunae through canaliculi.

small space containing an osteocyte in bones or chondrocyte in cartilage.

a rigid bar that pivots about one point and that is used to move an object at a second point by a force applied at a third.

The marrow cavity in the shaft of a long bone, center space of the diaphysis of a long bone, houses yellow marrow

bone foming cell

Large cells that resorb or break down bone matrix

mature bone cells that live in lacunae in small spaces in lamellae. Each lacuna is fluid-filled. Lacuna means "little lake".

the structural unit of compact bone; also called Haversian system. Each osteon consists of the hard bone matrix arranged in concentric rings (Concentric Lamellae) around a single central canal

Double-layered, thin veneer of connective tissue that covers the diaphysis of long bones - contains nociceptors (receptors that respond to potentially damaging stimuli) nerve endings - carries the blood vessels for the bone - is attached to bone by strong collagenous fibers called (sharpey fibers) that extend to the outer circumferential and interstitial lamellae - site of attachment for tendons and ligaments - has an underlying layer of osteoblasts that allow for bone growth in width