The jaw is a crucial part of the human body that enables various functions, primarily related to eating and speaking. It consists of two main parts: the upper jaw (maxilla) and the lower jaw (mandible). The jaw allows for the movement necessary to open and close the mouth, facilitating the chewing of food and the formation of speech sounds. Jaw function is supported by a complex system of muscles, ligaments, and joints, particularly the temporomandibular joint (TMJ). This joint connects the jaw to the skull, allowing for smooth movement. Proper jaw function is essential for digestion and communication, making it vital for daily life.