This paper describes a physical model of elementary particles based on the wave features of their behavior. Elementary particles are regarded as dynamical structures of the micro-world, interrelated with all levels of the Universe; i.e., inseparable from the structure of the Universe as a whole. Between any elementary particles and the ambient field of matter-space-time, as well as between elementary particles themselves, there exists an interchange of matter-space-time occurring both in horizontal (within the same level) and vertical (between different levels) directions. This model reveals the nature of mass and charge of elementary particles, which in turn leads to the unified description of fundamental (electromagnetic, gravitational, and nuclear) interactions, and other important results considered concisely here.
