Skeletal System Emily Davis Marina Tome Sam Watkins
Introduction Objective : Students will be able to identify the function and structures of the skeletal system. Distinguish between bones, ligaments, tendons, and cartilage. Describe the development of bones from cartilage and identify the difference between osteoclasts and osteoblasts. Describe the classification of joints by tissue and know the six types of synovial joints and their types of movement. Distinguish between the appendicular and axial skeletons. Finally, identify 23 major bones of the human body and their functions.
Function Five functions of the Skeletal System: –1) Provide points of attachments for muscles –2) Protect and support softer underlying tissues –3) House blood producing cells –4) Store inorganic salts –5) Contain passage ways for blood vessels and nerves SUPPORT
Bones, Ligaments, Tendons, and Cartilage Bones Ligaments (Binds bones to joints) Tendons (Attaches muscle to bone) Cartilage Tissue Type Connective Unique Characteristics Extracellular matrix Bone matrix Haversian Canals Sheet-like cords Collagenous Fibers White fibrous connective tissue 3 types Collagenous fibers Rigid
Intramembranous Flat Layers of connective tissue Enlarge into osteoBlasts Deposit boney matrix Spongy bone forms Periosteum Compact bone
Joints by Tissue FibrousCartilaginousSynovial Found between joints of bones Immovable Dense connective tissue Ex: Skull Connect through hyaline or fibrocartilage Limited Movement Ex: Between Vertebrae Capsules of ligaments Synovial membranes and fluid Covered by hyaline cartilage Six different types Ex: Elbow
Quick Review How many bones are there in the human body? –206 bones What are the two types of bone cells and what does each do? osteoBlasts - Build BoneosteoClasts - Crush Bone What are the three types of vertebrae and how many are there of each? –Cervical (7) Thoracic (12) Lumbar (5) Name all functions of the skeletal system.