Never underestimate the function of the bones. Bones are important to us because of it's 4 main functions.
Bones form the internal framework that support your body. They are like the pillars that support your house.
Bones protect soft body organs such as lungs and brain. Without bones, these organs will be damaged by external impact easily.
Skeletal muscles use bones as levers to move the body. Without bones, your movement will be retarded.
Bones are a good storage platform to store minerals such as phosphorus and calcium.