Biomechanics explores the mechanics of life and living systems, from molecules to organisms. It is essential for understanding biological processes and has applications in design, invention, and improving quality of life. The book follows an engineering approach, using observation, experimentation, theorization, validation, and application. It is divided into three volumes: the first on mechanical properties of living tissues, the second on circulation, and the third on motion, flow, stress, and growth. The first chapter introduces Newton's laws of motion and basic equations of solid and fluid mechanics, using biological examples. The second chapter discusses segmental movement and vibrations, using generalized coordinates and Lagrange's equations to analyze the musculoskeletal system. Chapters 3-9 cover external and internal flows, including fluid dynamics around moving bodies, blood flow in the circulatory system, gas flow in the lungs, and transport mechanisms in cell membranes. Chapters 10-12 focus on stress, strain, and the mechanical properties of organs, including the effects of stress on growth and resorption of tissues. The book also discusses the biological effects of stress and strain, the strength of tissues and organs, and the biomechanical aspects of growth and tissue engineering. It includes references, problems, and a detailed index. The author acknowledges the contributions of many colleagues and students, and notes that the book is a comprehensive but not exhaustive resource on biomechanics.Biomechanics explores the mechanics of life and living systems, from molecules to organisms. It is essential for understanding biological processes and has applications in design, invention, and improving quality of life. The book follows an engineering approach, using observation, experimentation, theorization, validation, and application. It is divided into three volumes: the first on mechanical properties of living tissues, the second on circulation, and the third on motion, flow, stress, and growth. The first chapter introduces Newton's laws of motion and basic equations of solid and fluid mechanics, using biological examples. The second chapter discusses segmental movement and vibrations, using generalized coordinates and Lagrange's equations to analyze the musculoskeletal system. Chapters 3-9 cover external and internal flows, including fluid dynamics around moving bodies, blood flow in the circulatory system, gas flow in the lungs, and transport mechanisms in cell membranes. Chapters 10-12 focus on stress, strain, and the mechanical properties of organs, including the effects of stress on growth and resorption of tissues. The book also discusses the biological effects of stress and strain, the strength of tissues and organs, and the biomechanical aspects of growth and tissue engineering. It includes references, problems, and a detailed index. The author acknowledges the contributions of many colleagues and students, and notes that the book is a comprehensive but not exhaustive resource on biomechanics.