This is probably true. To give an example, consider two very large branches of science- chemistry and biology. Both of these branches have their own branches, such as anatomy, physiology, organic chemistry, molecular biology, nuclear chemistry, qualitative chemistry, chemical engineering, genetics, and so on. As it turns out, however, biology is nothing more than an chemical processes, as in the action of the DNA molecule, and this means that the whole of biology can be worked into the theories of chemistry. Chemistry, in turn, acts upon the way subatomic particles interact with one another, and these interactions can be thought of as movements.
Movement is the realm of physics, and so chemistry can be incorporated into the theories of physics.
Using this same reasoning, we find that all sciences can be traced back eventually to the theories of physics. It is a very wide-ranging subject.