Collection
Heart, eye, voice, skeleton and nerves: the human body in 3D, layer by layer.
Apps
An anatomical heart with 95 parts: anatomy, cardiac valves, circulation and electrical activation with ECG. Slow motion, transparent walls, disassembly and five simplified condition comparisons connect electrical signals, contraction and blood flow.
Biology & neuroscienceTry it
Both eyes from BodyParts3D with six eye muscles, trochlea, optic nerve and visual pathway. Drag the gaze target and see which muscle works; CN III, IV or VI palsy with double vision. In the section a real ray path: cornea and lens refract, the lens accommodates with age, short- and long-sightedness with matching glasses.
Biology & neuroscienceTry it
Larynx, vocal folds, tongue, soft palate and lips from real anatomical data (BodyParts3D, 125 structures). Open the glottis and let it vibrate, tilt the pitch, shape and hear nine vowels in a sagittal section, play labial, dental and guttural consonants as syllables: the larynx supplies the tone, the tract makes the sound.
Biology & neuroscienceTry it
The cochlea uncoils: a travelling wave runs along the basilar membrane and peaks at its Greenwood place – high tones at the base, low tones at the apex. Two tones give two peaks, the microphone shows your own voice as a pattern; cross-section with the organ of Corti, age-related hearing loss and noise damage.
Biology & neuroscienceTry it
A BodyParts3D skeleton with 64 leg muscles walks on a treadmill, driven by averaged gait-lab measurements of about 50 adults at five walking speeds. Scrub the gait phases, joint angles with spread, EMG of eight muscles colouring the muscles in the model, ground reaction force as an arrow at the centre of pressure.
Biology & neuroscienceTry it
A neuron from the dendrites to the synapse: EPSPs sum at the axon hillock, above threshold an action potential arises and jumps from node to node at full strength. Loupes show Na⁺/K⁺ channels with inactivation and the Na⁺/K⁺ pump at a node of Ranvier, and Ca²⁺ influx, vesicle fusion and receptors at the synapse. Eight scrubbable phases with a potential trace, a subthreshold stimulus and myelin on/off for comparison.
Biology & neuroscienceTry it
A human body cell at 1 unit = 1 µm: nucleus with double envelope, nuclear pores and chromatin, rough ER continuous with the nuclear envelope, smooth ER, Golgi (cis/trans), endosomes, lysosomes, peroxisomes, mitochondria with cristae and mtDNA, centrosome, microtubules, actin cortex and intermediate filaments. The secretory pathway in seven scrubbable phases: transcription, nuclear pore, translation at the rER, COPII to the Golgi, cis→trans, vesicle on a microtubule, exocytosis. Cutting plane, layers and a membrane loupe.
Biology & neuroscienceTry it
An animal runs through an arena, every spike of a neuron leaves a dot, and a hexagonal grid grows out of random paths. In a concept space of a bird's neck and leg length the same grid appears — the brain orders concepts like places.
Perception & IllusionTry itCollections
Mathematical questions open for decades, for which an AI model proposed solutions in 2026, as interactive apps: understand the problem, experience the result.
24 appsOpen collection
From neurons and gradients to transformers, RLHF and agents: machine learning you can touch.
39 appsOpen collection
DNA, replication, transcription, translation and cell division as explorable 3D models.
11 appsOpen collection
Perspective, ornament, structure and space: how art and architecture work with mathematics.
9 appsOpen collection
Hyperloop, autonomous vehicles, warehouses and conveyors: logistics as interactive simulation.
17 appsOpen collection
Monty Hall, Simpson, Berkson and base rates: where intuition fails us with numbers.
14 appsOpen collection
Planets, stars, black holes and space probes: the cosmos to explore.
6 appsOpen collection
Riemann, P vs NP, Poincaré and other great questions of mathematics, made tangible.
16 appsOpen collection
Counting, arithmetic and shapes: maths for beginners, playful and clear.
6 appsOpen collectionWant to use these apps in your courses? Let’s find out what works for you.
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