| Term | Definition |
| plane (gliding) joint | least movable side to side only |
| ellipsoid (condyloid) joint | side to side and back and forth |
| hinge joint | like a door hinge bending and extending |
| saddle joint | two directional movement |
| pivot joint | one bone pivots in the arch of another |
| ball and socket joint | allows for complete range of motion |
| lumbar vertebrae | large thick bodies, short spinous processes |
| thoracic vertebrae | long spinous processes, rib facets |
| cervical vertebrae | transverse foramina, bifid spinous processes, vertebral prominens, atlas supports head, axis pivots to turn head |
| long bones | longer than they are wide; shaft and 2 ends |
| irregular bones | odd shapes; don't fit into other classes |
| flat bones | thin, flat, and often curved |
| sesamoid bones | short bones within tendons |
| short bones | roughly cube shaped |