Dendritic structures are branching, tree-like formations found in various natural and artificial systems. They can be observed in materials like metals and polymers, where the arrangement of particles creates a network that resembles the branches of a tree. These structures often influence the physical properties of the material, such as strength and conductivity. In biology, dendritic structures are crucial for the functioning of neurons, where they receive signals from other cells. The branching patterns of dendrites allow for complex communication within the nervous system, playing a vital role in processes like learning and memory.