Library

Learning modules

Every quiz, lesson, and clinical note in the atlas — filter by system, organ, or kind.

ReadLessonIntroHeart: the lesson

Structure and story of the heart, layer by layer.

3 min
ReadLessonIntroBrain: the lesson

Structure and story of the brain, layer by layer.

3 min
ReadLessonIntroLungs: the lesson

Structure and story of the lungs, layer by layer.

3 min
ReadLessonIntroLiver: the lesson

Structure and story of the liver, layer by layer.

3 min
ReadLessonIntroKidneys: the lesson

Structure and story of the kidneys, layer by layer.

3 min
ReadLessonIntroEye: the lesson

Structure and story of the eye, layer by layer.

3 min
ReadLessonIntroIntestine: the lesson

Structure and story of the intestine, layer by layer.

3 min
ReadLessonIntroPancreas: the lesson

Structure and story of the pancreas, layer by layer.

3 min
ReadLessonIntroSkin: the lesson

Structure and story of the skin, layer by layer.

3 min
ReadLessonIntroSkeleton: the lesson

Structure and story of the skeleton, layer by layer.

3 min
ReadLessonIntroMuscles: the lesson

Structure and story of the muscles, layer by layer.

3 min
ReadLessonIntroThe anatomical position, planes and axes

The reference posture every description in the course silently assumes, and the three planes cut through it.

4 min
ReadLessonIntroDirectional terms, in pairs

Superior and inferior, medial and lateral, proximal and distal — the vocabulary the rest of the course is written in.

5 min
ReadLessonCoreMovements at a joint

Flexion, abduction, rotation and the special movements that do not fit the three-plane scheme.

5 min
ReadLessonCoreCavities, serous membranes and regions

How the body is compartmented, what lines each compartment, and the surface landmarks used to find them.

5 min
ReadLessonIntroThe plasma membrane and how things cross it

Why the membrane holds together at all, and the four ways a molecule can get through it.

5 min
ReadLessonCoreThe organelles and the secretory pathway

Follow one protein from its gene to the outside of the cell, and meet each organelle where it does its work.

6 min
ReadLessonCoreCytoskeleton, junctions and the matrix

What gives a cell its shape, what holds it to its neighbours, and what happens clinically when either fails.

5 min
ReadLessonCoreThe cell cycle, mitosis and cell death

How a cell copies itself, what stops it doing so at the wrong moment, and how it dies on purpose.

6 min
ReadLessonIntroFertilisation and the first week

From the meeting of two gametes to a blastocyst arriving in the uterus, day by day.

5 min
ReadLessonCoreImplantation, the bilaminar disc and the annexes

The second week: burrowing into the endometrium, splitting into two layers, and building a placenta.

5 min
ReadLessonCoreGastrulation and neurulation

The third week: two layers become three, the notochord appears, and the nervous system is laid down.

6 min
ReadLessonAdvancedFolding, organogenesis and malformations

How a flat disc becomes a cylinder with a gut inside it, and why weeks 3 to 8 are the dangerous ones.

6 min
ReadLessonIntroHomeostasis and feedback loops

The single idea the whole of physiology is built on, and the two shapes a control loop can take.

5 min
ReadLessonCoreMembrane potential, action potential and the synapse

How a cell holds a voltage, how it inverts it in a millisecond, and how it passes the message on.

6 min
ReadLessonCoreThe cardiac cycle and gas exchange

One heartbeat in five phases, what sets cardiac output, and how the lung loads oxygen and unloads CO₂.

6 min
ReadLessonAdvancedRenal regulation and the endocrine axes

How the kidney sets the volume and composition of the internal environment, and how hormones are commanded.

6 min
ReadLessonIntroGametogenesis in both sexes

How a diploid stem cell becomes a haploid gamete — and why the male and female versions differ on almost every count.

6 min
ReadLessonCoreThe ovarian and uterine cycles

Twenty-eight days seen twice over: once in the ovary, once in the endometrium, with the hormones that link them.

6 min
ReadLessonCoreHormonal regulation of reproduction

One axis, two feedbacks, and the reversal that produces ovulation.

6 min
ReadLessonAdvancedFertilisation, pregnancy and controlling fertility

From the meeting of the gametes to the hormones of pregnancy, and how contraception interrupts the chain.

6 min
ReadLessonIntroMeiosis and the two shufflings

Two divisions, one replication — and the two mechanisms that make every gamete unique.

6 min
ReadLessonCoreMendelian transmission

The vocabulary that makes a genetics problem solvable, and the two crosses every exam is built on.

6 min
ReadLessonCoreHuman heredity and pedigrees

How to prove a mode of transmission from a family tree, and the arguments that actually count.

6 min
ReadLessonAdvancedMutations and chromosomal anomalies

What changes in the DNA, what changes in the karyotype, and the difference in consequences.

5 min
ReadLessonIntroSelf, non-self and the markers of identity

What the immune system reads before it decides to attack, and why a graft is rejected.

5 min
ReadLessonIntroInnate immunity: barriers, inflammation, phagocytosis

The first line — immediate, identical every time, and the same for every intruder.

6 min
ReadLessonCoreThe humoral response

B lymphocytes, plasma cells and antibodies — how the body neutralises what circulates in its fluids.

6 min
ReadLessonCoreThe cell-mediated response and immune cooperation

How the body deals with what hides inside its own cells, and why CD4 T cells command the whole system.

6 min
ReadLessonAdvancedMemory, vaccination and immune failure

Why the second encounter is different, how a vaccine exploits it, and what happens when the system breaks.

6 min