Question

how do ligaments help the skeletal system do its job? over time, ligaments become harder and turn into bone. ligaments connect bones to other bones. ligaments cover and protect bones from the outside. ligaments move blood between bones.

Explanation:

韧带是骨骼系统的结缔组织，其核心功能是连接骨与骨，以此维持关节的稳定性，保障骨骼系统的运动与支撑功能。其他选项中，韧带不会骨化、不负责保护骨骼外层、也不承担骨骼间血液运输的功能。

Answer:

Ligaments connect bones to other bones.