Bones, Bones, Bones Learn the bones of the human skeleton Tools A B humerus upper arm tibia shin bone fibula small bone in lower leb femur thigh bone ulna lower arm bone, forms the elbow radius lower arm bone, aligns with thumb clavicle collar bone scapula forms your shoulder blade cranium top of the head sternum ribs attach at chest ribs 14 pairs of them metacarpals bones of the wrist carpals bones of the hand phalanges fingers and toes pelvis hips metatarsals ankle bones tarsals foot bones axis the second vertebrae atlas the first vertebrae cervical vertebrae the vertebrae of the neck thoracic vertebrae the vertebrae of the chest region lumbar vertebrae the vertebrae of the lower back sacrum 3-5 fused bones, lower vertebrae coccyx 3 fused bones, "tailbone"