Human Physiology Notes for NEET

System-by-System Approach to Human Physiology Notes

Human Physiology comprises six chapters covering the major organ systems, and effective notes must organise each system around three pillars: anatomy (structure), physiology (function), and regulation (hormonal and neural control). For the circulatory system, notes should cover heart anatomy with four chambers, the conduction system (SA node, AV node, Bundle of His, Purkinje fibres), the cardiac cycle timing, and ECG interpretation. For the excretory system, the nephron is the functional unit, and notes should trace the journey of filtrate from Bowman's capsule through the PCT, loop of Henle (countercurrent mechanism), DCT, and collecting duct, noting what is reabsorbed and secreted at each segment. The key to effective physiology notes is connecting structure to function: the length of the loop of Henle determines urine concentrating ability, the thin walls of alveoli enable gas exchange, and the villi of the small intestine increase absorption surface area.