What protects a developing baby from bumps and jolts?

A developing baby is protected from bumps and jolts by the amniotic fluid within the amniotic sac, which cushions the baby and absorbs shocks. The uterine walls also provide a supportive environment, allowing for some movement while maintaining a safe space. Additionally, the pelvic bones help shield the uterus from external impacts. Together, these factors create a protective barrier for the developing fetus.