Ch 1 Introduction to the human body
Levels of organization, anatomical language, planes, cavities and feedback.
Start here · Animated walkthroughBody Basics WalkthroughZoom from atom to organism, slice the body in every plane, and watch feedback loops keep you at 37 °C.
Games + simulatorBody Basics LabBody Atlas, Plane Slicer, cavity and region sorter, and a feedback loop builder with a thermoregulation simulator.
Ch 2 The chemical level of organization
Atoms, bonds, water, pH and the molecules of life.
Start here · Animated walkthroughBody Chemistry WalkthroughWatch bonds form, water split molecules apart, buffers soak up acid, and enzymes do their work.
Games + simulatorsBody Chemistry LabBond Builder, a pH and buffer beaker, a macromolecule builder, and an enzyme lab.
Ch 3 The cellular level of organization
Membrane transport, organelles, DNA to protein, and cell division.
Start here · Animated walkthroughCell WalkthroughSee molecules cross the membrane, a protein get built and shipped, and a cell divide.
Games + simulatorCell LabTonicity lab, transport sorter, codon decoder, and mitosis sorter.
Ch 4 The tissue level of organization
Epithelial, connective, muscle and nervous tissue.
Start here · Animated walkthroughTissues WalkthroughBuild each tissue cell by cell, see it under a drawn microscope, and watch inflammation and repair.
Games + simulatorTissues LabName That Tissue, a decision tree, a location matcher, and an inflammation simulator.
Ch 5 The integumentary system
Skin layers, melanin, vitamin D and burns.
Start here · Animated walkthroughSkin Layers WalkthroughFollow one skin cell from the stratum basale to the surface, then see how melanin and vitamin D work.
GameBurn TriageSee how deep each burn degree goes, classify 12 burn cases, and estimate burn area with the Rule of Nines.
Ch 6 Bone tissue
How bone forms, heals, and keeps blood calcium steady.
Start here · Animated walkthroughBone Formation WalkthroughIntramembranous and endochondral ossification, the growth plate, and fracture repair, step by step.
GameBone BuilderOrder the stages, sort facts by process, and name the stage from a picture.
SimulatorCalcium Balance SimulatorPush blood calcium up or down and watch PTH, calcitonin and vitamin D bring it back.
Ch 7–8 The skeleton
Bones, bone markings and vertebrae.
Start here · Animated walkthroughSkeleton WalkthroughWatch the skull assemble, the spine stack and curve, the rib cage breathe, and the limbs and girdles come together.
GamesSkeleton LabLabel the skull, vertebra, pelvis, femur and humerus; identify vertebrae; race the clock in Bone Chase.
Ch 9 Joints
Joint classification and body movements.
Start here · Animated walkthroughJoints WalkthroughJoint types built layer by layer, every movement term in motion, and the shoulder, hip, knee, ankle and jaw up close.
Animations + gamesJoints LabAnimated synovial joint types, a joint sorter, and Movement Mimic: watch a movement and name it.
Ch 10 Muscle tissue
The neuromuscular junction, contraction and muscle tension.
Start here · Animated walkthroughContraction WalkthroughFrom a nerve signal to relaxation, one animated step at a time, each with a quick check.
GameContraction ChainPut the steps in order, then work out what happens when one link breaks.
SimulatorMuscle Tension SimulatorTurn up the stimulus and watch a twitch become tetanus; explore length–tension and fiber types.
Printable study guide (PDF)Muscle Contraction Without the PanicThe whole story in plain English, with worked examples and practice questions.
Ch 11 The muscular system
Muscle names, levers, and what muscles attach to and do.
Start here · Animated walkthroughMuscular System WalkthroughOrigins and insertions, levers, fascicle shapes, and the major muscles of the head, trunk and limbs contracting.
GamesMuscle System LabDecode muscle names, find the fulcrum, load and effort in levers, and match origins, insertions and actions.
Ch 12 Nervous tissue
Resting potential, action potentials and synapses.
Start here · Animated walkthroughAction Potential WalkthroughWatch the ion channels open and close while the voltage graph moves with them.
GamesNeuron LabMake a neuron fire with summation, see what drugs and diseases break, and match channels to each phase.
Ch 13 Anatomy of the nervous system
Brain regions, meninges, CSF, spinal cord and nerves.
Start here · Animated walkthroughNervous System Anatomy WalkthroughWatch the brain develop, light up its regions, follow CSF as it flows, and send signals through the spinal cord.
Games + simulatorNervous System Anatomy LabBrain region mapper, CSF flow simulator, spinal cord lab, and cranial nerve challenge.
Ch 14 The somatic nervous system
Senses, sensory and motor pathways, and reflexes.
Start here · Animated walkthroughSenses and Reflexes WalkthroughTaste, smell, hearing, balance and vision; signals crossing the spinal cord; and reflex arcs in action.
Games + simulatorsSenses and Reflexes LabPathway tracer, reflex lab, ear lab, and eye lab.
Ch 15 The autonomic nervous system
Sympathetic and parasympathetic control.
Start here · Animated walkthroughAutonomic WalkthroughTwo-neuron chains, receptors, and the whole body switching between fight-or-flight and rest-and-digest.
Games + simulatorAutonomic LabSorter, autonomic switchboard, receptor and drug lab, and pathway builder.
Ch 16 The neurological exam
Testing the nervous system and finding the problem.
Start here · Animated walkthroughNeuro Exam WalkthroughWatch every part of the bedside exam and learn how findings point to a location.
Games + simulatorNeuro Exam LabExam simulator, Lesion Detective, cranial nerve test match, and UMN vs LMN reflex bench.
Ch 17 The endocrine system
Hormones, glands and feedback.
Start here · Animated walkthroughEndocrine WalkthroughHormones travel, bind and amplify; follow the pituitary, thyroid, adrenal and blood sugar control.
Games + simulatorsEndocrine LabHormone axis simulator, blood glucose simulator, what-breaks cases, and gland matcher.
Ch 18 Blood
Blood cells, clotting and blood types.
Start here · Animated walkthroughBlood WalkthroughSpin a blood sample, follow red cells from birth to recycling, watch a clot form, and see blood types clash.
Games + simulatorBlood LabBlood typing lab, transfusion matcher, EPO simulator, and hemostasis.
Ch 19 The heart
Blood flow, conduction, the ECG and cardiac output.
Start here · Animated walkthroughHeart WalkthroughBlood moves through every chamber and valve, the impulse travels while the ECG draws, and the cardiac cycle plays out.
Games + simulatorsHeart LabBlood flow path, conduction and ECG lab, Wiggers explorer, and cardiac output simulator.
Ch 20 Blood vessels and circulation
Vessels, blood pressure, capillary exchange and circulation routes.
Start here · Animated walkthroughBlood Vessels WalkthroughPressure, resistance, capillary exchange, blood pressure reflexes and the fetal shunts, all in motion.
Simulators + gameBlood Vessels LabCapillary exchange, blood pressure control, resistance and flow, and a route tracer.
Ch 21 The lymphatic and immune system
Lymph, innate and adaptive defenses, antibodies and vaccines.
Start here · Animated walkthroughImmune WalkthroughWatch lymph flow, phagocytes eat, T and B cells activate, and antibodies go to work.
Simulators + gamesImmune LabInfection response, defender sorter, vaccine memory, antibody lab, and lymph flow tracer.
Ch 22 The respiratory system
Breathing, gas exchange and oxygen transport.
Start here · Animated walkthroughRespiratory WalkthroughFollow a breath of air, watch Boyle's law move it, and see O₂ and CO₂ cross and ride the blood.
Simulators + gamesRespiratory LabBreathing mechanics, spirometer, oxygen–hemoglobin curve, and gas exchange cases.
Ch 23 The digestive system
From mouth to absorption.
Start here · Animated walkthroughDigestion WalkthroughFollow food through the tract as enzymes, bile and hormones break it down and nutrients are absorbed.
Games + simulatorDigestion LabMeal journey, enzyme matcher, hormone control, and what-breaks cases.
Ch 24 Metabolism and nutrition
Making ATP, storing fuel, fed and fasting states.
Start here · Animated walkthroughMetabolism WalkthroughGlycolysis, the Krebs cycle and the electron transport chain running in front of you, plus fat and protein fuel.
Simulators + gamesMetabolism LabATP factory, fed vs fasting switchboard, pathway sorter, and heat and energy balance.
Ch 25 The urinary system
Filtration, reabsorption, secretion and urine.
Start here · Animated walkthroughUrinary WalkthroughFiltrate flows through a working nephron while each segment takes back or adds what the body needs.
Simulators + gamesUrinary LabNephron simulator, filtration pressure, urine's journey, and what-breaks cases.
Ch 26 Fluid, electrolyte and acid–base balance
Body fluids, electrolytes, buffers and blood gases.
Start here · Animated walkthroughFluid and Acid–Base WalkthroughFluid compartments fill and shift, electrolytes move, and the bicarbonate seesaw tips with each disorder.
Game + simulatorsFluid and Acid–Base LabABG Detective, acid–base simulator, fluid shift simulator, and electrolyte matcher.
Ch 27 The reproductive system
Gametes, hormones and the monthly cycle.
Start here · Animated walkthroughReproductive WalkthroughSpermatogenesis, oogenesis and the hormone axes, with the ovarian and uterine cycles in sync.
Simulator + gamesReproductive Lab28-day cycle simulator, gametogenesis comparison, hormone axis game, and anatomy labeling.
Ch 28 Development and inheritance
From fertilization to birth, and how traits are inherited.
Start here · Animated walkthroughDevelopment WalkthroughFertilization, implantation, germ layers, the placenta, fetal circulation, birth, and Punnett squares.
Games + simulatorDevelopment LabFirst two weeks sequencer, germ layer sorter, Punnett square lab, and fetal circulation.
Suggested order: start with the walkthrough for a topic, one step at a time. Then play the game or try the simulator. If something feels confusing, go back to that step. Wrong answers are part of learning here.