Notes for Skeletal System

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Submitted By brittleann1924
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Intro to the Skeletal System. Chap 6:

Bones are composed of several different tissues working together * osseous tissue * cartilage * dense connective tissue * epithelium * adipose tissue * nervouse tissue
All of the bones and the cartilages,

Functions: * supports soft tissues and provides attachment points for tendons of skeletal muscles * protects the most important internal organs * assists in movement by acting as levers for skeletal muscles * osseous tissue stores and releases minerals, particularly calcium and phosphorus * red marrow within bones produces blood cells * yellow marrow within bones stores triglycerides, a source of potential energy reserve
Classification:
-longbones -- greater length than width
- short bones -- nearly equal in l & w
- flat bones -- thin
- irregular bones -- complex shapes
- sesamoid bones -- shaped like a sesame seed
Long bone anatomy: * -Regions of a long bone * Diaphysis (Shaft) * Medullay cavity (inside shaft) * 2 Epiphyses (proximal and distal) * 2 Metaphyses (join diaphysis and epiphysis with epiphyseal plate, or line once growth stops) * -Surface tissues * Endosteum * Periosteum * Articular cartilage *

Osseous Tissue * -Extra cellular matrix of connective tissue * Water * Collagen fibers- gives property of flexibility and tensile strength * Crystallized mineral salts of hydroxyapatities – gives property of hardness * -Four principal type of cells * Osteogenic- undifferentiated, give rise to osteoblasts (not as important) * Osteoblasts- * Osteocytes- * Osteoclasts- Bone destroying

Types of Osseous Tissue * -compact bone * forms external layer of all bones and comprises most of the diaphysis of long bones * -spongy bone * forms interior of short, flat,…...

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