Educational Biology Series
⌬ Educational Biology Series · Vol. I Introduction to Human Physiology A comprehensive guide to how the human body works — from cells to organ systems — with real-world examples and visual illustrations. Contents 01 What Is Physiology? 02 The Cell 03 Organ Systems 04 Cardiovascular 05 Respiratory 06 Nervous System 07 Digestive System 08 Homeostasis 09 Endocrine System 10 Musculoskeletal 01 What Is Human Physiology? Physiology is the branch of biology that studies the mechanical, physical, biochemical, and chemical functions of living organisms. Human physiology specifically focuses on how the human body functions — from individual atoms and molecules all the way up to complex organ systems working in concert. The word originates from the Greek physis (nature) and logos (study). Ancient physicians like Galen (129–216 AD) and later William Harvey (1578–1657), who discovered blood circulation, laid the early groundwork for this s...