Introduction to Human Anatomy and Physiology
Ever wonder why marathon runners sometimes collapse? The story of Kati Mori at the London Marathon introduces us to how our bodies work. Anatomy deals with body structures while physiology examines how those parts function.
Your body constantly works to maintain homeostasis – a balanced internal environment. This happens across multiple levels of organization, from tiny atoms to complete organ systems. Everything in your body follows this pattern: atoms → molecules → cells → tissues → organs → organ systems → organism.
All living humans perform seven essential functions: organization, metabolism, responsiveness, movement, growth, reproduction, and development. Metabolism involves all physical and chemical changes occurring in your body and requires energy from nutrients.
💡 Quick Fact: Cells become specialized through a process called differentiation, where they activate or deactivate specific genes to perform unique functions in your body!
Your body requires specific elements to survive: oxygen (for cell energy), nutrients (water, food, vitamins), proper temperature, and atmospheric pressure. These requirements are especially critical during intense physical activities like marathons.
