What substance provides protection to a fetus in the womb?

The substance that provides protection to a fetus in the womb is amniotic fluid. This fluid plays a crucial role in the development and well-being of the fetus. It serves multiple functions, including cushioning the fetus against external forces and helping to maintain a stable temperature. The fluid also allows for easier movement, which is important for musculoskeletal development.

While the placenta and umbilical cord are essential for supplying nutrients and oxygen to the fetus and removing waste products, they do not primarily provide mechanical protection. The chorion contributes to the formation of the placenta, but it is the amniotic fluid that acts directly to safeguard the fetus from shocks and injuries. Therefore, amniotic fluid is critical for ensuring a safe environment as the fetus grows and develops.