Neurons are the fundamental building blocks of the nervous system, serving as the communication channels between various parts of the body. These specialized cells transmit information through electrical and chemical signals. The cell body is at the core of a neuron, which contains the nucleus and other essential organelles. Axons are integral components of neurons, responsible for transmitting electrical impulses away from the cell body to other neurons, muscles, or glands. These elongated structures are crucial for the proper functioning of the nervous system, enabling communication between different parts of the body. Axons are surrounded by a protective myelin sheath, which enhances the speed and efficiency of signal transmission. The structure of axons varies widely, with some extending over long distances within the body, while others remain relatively short. Axons terminate at synapses, where they communicate with other neurons by releasing chemical messengers called neurotransmitters. In addition to their role in transmitting signals, axons play a vital role in neural development and regeneration. During embryonic development, axons navigate complex pathways to establish connections with target cells. In cases of injury, axons possess some capacity for regeneration, although this process is often limited and varies depending on various factors. Disorders affecting axons can have profound effects on neurological function. Conditions such as multiple sclerosis, where the myelin sheath is damaged, can disrupt signal transmission and lead to symptoms such as weakness, numbness, and impaired coordination. This book brings forth some of the most innovative concepts and elucidates the unexplored aspects of neurons. It is a compilation of chapters that discuss the most vital concepts and emerging trends in the field of axons. The extensive content of this book provides the readers with a thorough understanding of the subject.