Hyoid bone AXIAL Sternum SKELETON Clavicle Scapula Ribs Hyoid bone Vertebra Sternum Innominates Vertebra Clavicle Sacrum Innominates Scapula coccyx Sacrum Ribs Coccyx Flat Bones -- sternum, ribs Protection Irregular Bones -- vertebra, innominate, Muscle Anchor sacrum, coccyx, Flexibility clavicle, scapula, hyoid Hyoid Bone Greater wings Lesser wings Hyoid Bone • Anchor for pterygoid muscles • Necessary for speech • Found for Neandertals 1 Sternum Manubrium Clavicular notch Body Costal notchs Xyphoid Process sternum • Anchor for muscles • Protection for heart clavicle Sternal End Scapular End Costoclavicular ligament attachment Conoid Tubercle Acromion Coronoid Spine scapula scapula • Protection for lungs Blade • Anchor for numerous Glenoid arm and back muscles Notch 2 Vertebra RIBS Head Neck False Ribs Angle Facet • Protection for spinal cord • Anchor for numerous muscles Floating Ribs Vertebra Vertebra Intervertebral disks Cervical Vertebra Cervical Vertebra Transverse foramen 3 Atlas Axis Dens apistrophe Superior articular facets Superior articular facets Vertebral foramen Transverse foramen Transverse foramen Body Transverse process Spinous process Vertebral foramen Inferior articular facets Inferior articular facets Transverse process Spinous process Thoracic Vertebra Body Superior articular facet Vertebral foramen Transverse foramen Transverse process Spinous process Rib Facets C3 - C7 Lumbar Vertebra Thoracic Vertebra 4 L5 L1 lumbar Orientation of the Ala bones of the Thorax Promotory Vertebra Articular Surface sacrum Ribs Sternum sacrum coccyx 5 innominates innominates Acetabulum 6.