The skeletal system is composed of 206 bones that support the body. The skeletal system is divided into the axial skeleton which includes the skull, vertebral column, and rib cage, and the appendicular skeleton which includes the pectoral girdle, pelvic girdle, and appendages. There are three types of joints - synarthroses which allow little movement, amphiarthroses which allow slight movement, and diarthroses which allow free movement. The six types of diarthroses joints are ball-and-socket, condylar, saddle, pivot, hinge, and gliding joints, each allowing different ranges and types of motion.

1. SKELETAL SYSTEM Celeste Roderno- Desingaño

4. Skeleton Region Types of Bone Number of Bones A X I A L Skull Cranial Bone Facial Bone Mandible Ear Bone Hyoid Bone 8 13 1 6 1 Vertebral Column Cervical Vertebrae Thoracic Vertebrae Lumbar vertebrae Sacrum Coccyx 7 12 5 1 1 Thoracic Cage Rib bones Sternum 24 1 A P P E N D I C U L A R Pectoral girdle Clavicle Scapula 2 2 Arms Humerus Radius Ulna Carpal Bones Metacarpal Bones Fingers/ Phalanges 2 2 2 16 10 28 Legs Femur Fibula Tibia Tarsal Bones Metatarsal Bones Toes/ Phalanges 2 2 2 14 10 28 Pelvic Girdle Coxal 4 Total 206