Chapter 6 6.1 The Functions of the Skeletal System (pg. 216-220):  Bone (osseous tissue): o Hard, dense connective tissue that forms skeleton. o Supports the body o Bone marrow:  Yellow marrow: contains adipose tissue  Red marrow: produces blood cells (red, white, platelets) o Mostly inorganic material:  Hydroxyapatite- gives bone its hardness and strength o Cells of the bone:  Osteoblast-forms new bone through synthesis and secretion of collagen and calcium  Osteocyte- osteoblast that is trapped in the matrix it deposited  Osteogenic cells: mitotically active bone cells that develop into osteoblasts  Osteoclast- breaks down bone  Cartilage: o Spongy bone o Semi-ridged connective tissue o Provides flexibility  Skeletal system: o System made of bone and cartilage o Functions:  Support body  Allow movement  Point of attachment for muscles  Protect organs  Produce blood cells  Store and release minerals and fats  Particularly calcium and phosphorus 6.3 Bone structure (pg. 222-232):  Long bone: o Diaphysis: shaft running between proximal and distal end of the bone  Composed of dense bone