Physiology

How every system in the body functions — heart, lungs, kidneys, brain, hormones, immune system, muscles, and homeostasis.

📖 14 lessons🆓 Free📚 Peer-reviewed
1
Introduction to Physiology
Homeostasis, feedback loops, set points, and the fundamental principles of body function.
7 min
2
Homeostasis and Feedback
Negative and positive feedback. Temperature, glucose, and blood pressure regulation.
8 min
3
Cardiovascular Physiology
Cardiac output, stroke volume, blood pressure, Starling's law, and the ECG.
9 min
4
Respiratory Physiology
Lung volumes, V/Q ratio, oxygen delivery, CO₂ transport, and respiratory control.
9 min
5
Renal Physiology
GFR, tubular reabsorption, RAAS system, ADH, and acid-base regulation.
8 min
6
Neurophysiology
Action potentials, synaptic transmission, neurotransmitters, and the blood-brain barrier.
9 min
7
Endocrine Physiology
Pituitary, thyroid, adrenal, and pancreatic hormones and their clinical disorders.
8 min
8
Digestive Physiology
Digestion, absorption, GI motility, secretions, and gut hormones.
8 min
9
Immune Physiology
Innate responses, adaptive immunity, cytokines, inflammation, and complement.
8 min
10
Muscle Physiology
Sliding filament theory, motor units, muscle fibre types, and fatigue.
8 min
11
Reproductive Physiology
HPG axis, menstrual cycle, pregnancy hormones, and parturition.
8 min
12
Growth and Development
Growth hormone, IGF-1, puberty, ageing, and developmental milestones.
7 min
13
Blood and Haematopoiesis
Blood components, haematopoiesis, coagulation cascade, and blood groups.
8 min
14
Temperature Regulation
Thermogenesis, heat dissipation, fever, hypothermia, and heat stroke.
7 min
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