Biomechanics is an interdisciplinary field that applies the principles of physics and engineering mechanics to the study of living organisms and biological systems. It investigates the mechanical forces, stresses, and strains acting within tissues, joints, and organs, providing quantitative insights into how movement occurs and how biological structures respond to external loads. The scope of biomechanics ranges from analyzing locomotion and gait patterns to characterizing fluid flow through vascular systems. Applications are found in the development of rehabilitation strategies, the design of assistive technologies, and the improvement of understanding in areas such as sports science and musculoskeletal health, aiming to optimize function and predict structural failure under physical stress.