| A | B |
|---|
| arthritis | inflammation of a joint |
| articular cartilage | thin layer of cartilage over the ends of long bones |
| atlas | first cervical vertabra, articulates with axis and occipital skull bone |
| axis | second cervical vertebra |
| bursa sacs | small sac interposed between parts that move on one another |
| circumduction | circular movement of a joint |
| extension | act of increasing the angle between two bones |
| kyphosis | hunchback, humped curvature in spinal column |
| lordosis | forward curvature of lumbar region of spine |
| osteoblast | cells involved in formation of bony tissue |
| osteoclast | cells involved in resorption of bony tissue |
| osteocyte | bone cell |
