Why cats sometimes make baby cry sound?

My kitten tends to make the baby cry's when she needs something. For instance, when she wants more food or water she makes that sound or if she gets locked in a room and wants to get out she makes that sound. She is also still a kitten so I hear more of a crying from her then I have other cats. I don't really hear her screaming or hissing at all since she is always indoors and not around any other animals.