VisuApps
Experience living structures and processes in 3D
Apps
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.
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Every new areole forms at the apex, turned by the same angle against the previous one. At the golden angle of 137.5° the cactus shows 8, 13 and 21 spirals; half a degree off, the pattern breaks into arms with gaps, and at 144° into five straight spokes. Change the angle live, watch it grow, colour and count the spirals.
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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.
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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.
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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.
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The whole body as 2,172 individually modelled, named structures (BodyParts3D) in seven layers: a slider pulls skeleton, muscles, organs, skin, vessels, nerves and more apart; every part is clickable, searchable and can be isolated — with German and English names and FMA identifier.
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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.
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Explore skeleton, muscles, organs and skin interactively — toggle four layers individually, heartbeat and breathing live.
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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.
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A neuron with dendrites, myelinated axon and synapse — action potential, nodes of Ranvier and neurotransmitters live in 3D.
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A real protein chain folds before your eyes: hydrophobic collapse, helices and sheets, energy funnel and Levinthal calculation. Heating unfolds it, cooling folds it again.
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A saguaro in the Sonoran Desert over 24 hours: at night the stomata open and CO₂ is stored as malic acid in the vacuole; by day they stay shut and the Calvin cycle turns it into sugar. Cell zoom, acid curve and a water counter compared with a C3 plant.
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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.
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Real skull scans of dog, wolf, cat, lion, brown bear and red deer: canines and carnassials, grinding molars, a jaw joint you can open and chew with. Plus walking skeletons: plantigrade, digitigrade and unguligrade, with a human alongside if you like.
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