Biology: Skeletal System

321 Words2 Pages
Skeletal System * Function of the Skeletal System * Support - framework that supports body and cradles its soft organs * Protection - for delicate organs, heart, lungs, brain * Movement - bones act as levers for muscles * Mineral storage - calcium & phosphate * Blood cell formation – hematopoiesis * Types of Bones * Long Bones - metacarpals, metatarsals, phalanges, humerus, ulna, radius, tibia, fibula * Short Bones - carpals, tarsals * Flat Bones - rib, scapula, skull, sternum * Irregular Bones - vertebrae, some facial bones * Sesamoid – patella * Skeletal Organization 1. Axial Skeleton * skull, ribs, vertebral column 2. Appendicular skeleton - arms, legs, and bones that anchor the limbs to the axial skeleton. * Axial Skeleton 1. Cranium Facial Bones Anterior View Anterior View 2. The Vertebral Column * Cervical Vertebrae (7) * Thoracic Vertebrae (12) * Lumbar Vertebrae (5) * Sacrum Coccyx 3. The Thoracic Cage * Sternum * True Ribs (7) * False Ribs (3) * Floating Ribs (2) 4. Sacrum & Coccyx * Appendicular Skeleton 1. Bones of the Pectoral Girdle 2. The Upper Limb (Forelimb) 3. Humerus 4. Ulna & Radius 5. Hand Bones 6. Pelvis 7. The Lower Limb (Legs) 8. Femur 9. Patella 10. Tibia & Fibula 11. Foot * Interesting Facts * Do we have more bones when we are a baby or when we are all grown up? * Baby has 305 bones and an adult has 206 bones. This is because as we grown some of our bones join together to form one bone. * The longest bone in our bodies is the femur (thigh bone). * The smallest bone is the stirrup bone inside the ear. * Each hand has 26 bones in

More about Biology: Skeletal System

Open Document