The second half of the chapter focuses on adaptation, microscopic structure, disease, and medical insight.
Videos 96–100 show how the body adapts to physical demands through exercise, strengthening muscles, bones, and cardiovascular function. You then explore cells and tissues, revealing how microscopic structure supports organ function. Pathology explains how disease alters normal anatomy and disrupts structure. Medical imaging demonstrates how modern technology allows clinicians to see inside the body to diagnose and treat illness. The chapter concludes with body systems integration, showing how all organs and systems work together to maintain homeostasis, adapt to challenges, and sustain life.