 The Skeletal System

Bone Classification  Long bones: arms  Short bones: wrists  Flat bones: scapula  Irregular bones: vertebrae

Identify Bone Shapes!

Long Bones: Parts  Epiphysis: “knobby” ends of the long bones  Articular cartilage: Outside portion of the epiphysis which provides smooth glide for joints  Diaphysis: The narrow, length section of a long bone  Periosteum: outermost covering of fibrous tissue on the bone

Long Bones: Parts Cont.  Compact bone: section of the bone with no gaps which makes up the wall of the diaphysis  Spongy bone: section of the bone with thin layer of bone with gaps which makes up the epiphysis  Medullary cavity: hollow chamber in the middle of the diaphysis  Endosteum: lines the medullary cavity and houses the bone-forming cells  Marrow: connective tissue found in the gaps of bones.

Intramembranous vs. Endochondral  Bones classified by the way they develop  Most bones are endochondral  Please look at page 198 in your book and crate a Venn Diagram to highlight the major differences between intramembranous bone development and endochondral bones