- 破骨细胞 pògǔxìbāo osteoclastA type of cell that breaks down and absorbs old bone tissue during growth and healing. It works alongside the [[造骨细胞|造骨細胞|zao4 gu3 xi4 bao1]] to maintain the metabolism of the skeleton.
- 造骨细胞 zàogǔxìbāo osteoblasta cell that develops bone and is responsible for bone formation