An anatomically correct heart cutaway — four chambers, valves, great vessels, flow arrows — from one prompt. This page collects 20 anatomy prompts at that standard: heart, brain, neurons, barriers, and organ systems. Each prompt names its panels, quotes its labels, and carries a verify note, because anatomy is exactly where AI illustration earns trust or loses it.
Open the anatomy presets · Medical illustration guide · Biology prompt pack
A warning before the prompts: mirrored and subtly wrong anatomy is the most common AI failure in this discipline, and it is plausible-looking — that combination is why every entry below has a specific check. For anything clinical, teaching-critical, or published, treat output as a draft and verify against an atlas. Our verification guide covers the full protocol.
Heart and circulation
1. Human heart blood flow
An anatomically correct frontal cutaway of the human heart showing blood flow, with
oxygenated and deoxygenated paths, a small valve close-up and directional arrows.
Label "RIGHT ATRIUM", "RIGHT VENTRICLE", "LEFT ATRIUM", "LEFT VENTRICLE", "AORTA",
"PULMONARY ARTERY". Title: "THE HUMAN HEART".
Verify: right side = deoxygenated (blue), left = oxygenated (red); the pulmonary artery carries blue blood and the pulmonary vein red — the one fact every generated heart gets wrong first.
2. Cardiovascular atlas plate
A comprehensive medical-atlas plate of the human heart and circulation: a large
anatomically accurate frontal cutaway with all four chambers and valves, the
coronary arteries traced on the surface, the great vessels entering and leaving,
one magnified valve inset showing leaflet detail, one coronary cross-section inset,
and a compact schematic of the pulmonary and systemic loops with red and blue flow
arrows. Label "RIGHT ATRIUM", "LEFT VENTRICLE", "AORTA", "MITRAL VALVE", "CORONARY
ARTERY". Title: "THE HEART AND CIRCULATION".
Verify: mitral valve on the left, tricuspid on the right; coronary arteries on the heart surface, not inside chambers.
3. Heart anatomy QA comparison
A QA comparison of two generated heart cutaways: version A with four chambers
correctly placed, version B with mirrored chambers and a stray vessel, each error
circled in red with short correction notes. Label "CORRECT", "FLAWED".
Title: "TRUST BUT VERIFY".
Use this one in teaching about AI anatomy — it shows what the failure actually looks like.
Brain and neurons
4. Four specialized cells
A comparative row of four specialized cells at matching scale: a neuron with
dendrites and long axon, a red blood cell as a biconcave disc, a sperm cell, and a
macrophage spreading pseudopods, each with two functional labels.
Title: "CELL SPECIALISTS".
Verify: neuron — dendrites many and short, axon single and long; if the drawing gives it two axons, regenerate.
5. Hippocampus memory circuit
A hippocampal circuit figure: entorhinal cortex input entering the dentate gyrus,
the CA3-CA1 trisynaptic loop, and output via the subiculum, with a
long-term-potentiation inset showing synaptic strengthening spikes.
Label "ENTORHINAL", "DENTATE GYRUS", "CA3", "CA1", "LTP". Title: "MEMORY CIRCUIT".
Verify: the loop order entorhinal → dentate → CA3 → CA1 → subiculum; arrows all one way around the loop.
6. Alzheimer pathology
A coronal brain section highlighting the hippocampus in Alzheimer disease, with
amyloid plaques as small extracellular deposits and neurofibrillary tangles inside
neurons, plus one magnified inset of a plaque and a tangle. Label "HIPPOCAMPUS",
"PLAQUE", "TANGLE", "NEURON". Title: "ALZHEIMER PATHOLOGY".
Verify: plaques extracellular, tangles intracellular — the two get swapped surprisingly often.
7. Synapse pruning
A developmental neuroscience figure: an over-wired neonatal dendrite with many weak
synapses, microglia tentacles tasting and removing the weak ones, and the refined
adolescent circuit with fewer strong connections, plus a density curve inset.
Label "DENDRITE", "MICROGLIA", "WEAK SYNAPSE", "STRONG SYNAPSE".
Title: "PRUNING THE BRAIN".
Barriers and systems
8. Blood-brain barrier
A cross-section of the blood-brain barrier: capillary endothelial cells joined by
tight junctions, the basement membrane, astrocyte end-feet wrapping the outside,
and a pericyte, with small molecules crossing while large proteins cannot.
Label "ENDOTHELIUM", "TIGHT JUNCTION", "BASEMENT MEMBRANE", "ASTROCYTE",
"PERICYTE". Title: "THE GATEKEEPER".
Verify: tight junctions between endothelial cells (that's what makes it a barrier); astrocyte end-feet on the brain side, outside the membrane.
9. Plaque burden in brain tissue
A cross-section of cerebral cortex tissue showing extracellular amyloid deposits,
dystrophic neurites around them, and a magnified inset detailing one deposit with
its dense core and diffuse halo. Label "CORTEX", "DEPOSIT", "DARK CORE", "HALO".
10. Tau therapy strategies
A two-path therapy figure for tau pathology: the upper path shows an antibody
binding tau outside the neuron to speed clearance, the lower path shows an
antisense oligonucleotide entering the neuron to reduce tau production, both
meeting at reduced tangle load. Label "ANTIBODY", "TAU", "ASO", "REDUCED TANGLES".
Title: "TARGETING TAU".
Verify: antibody stays outside the neuron, ASO enters it — the inside/outside distinction is the whole point of the figure.
Immunology figures
11. CAR-T manufacturing workflow
A five-step hospital workflow for producing a patient's own CAR-T cells: blood
draw, T-cell separation in the lab, gene transfer with a viral vector, cell
expansion in a culture bag, and infusion back into the patient.
Label "LEUKAPHERESIS", "SELECTION", "GENE TRANSFER", "EXPANSION", "INFUSION".
Title: "CAR-T JOURNEY".
12. CAR-T in the body
An end-to-end therapy figure: engineered T cells circulating in a vessel, exiting
into a tumor bed, recognizing their antigen, and destroying tumor cells by granzyme
release, with a small patient-silhouette inset locating the action.
Label "INFUSED CELLS", "ANTIGEN", "GRANZYME", "TUMOR CELL".
Title: "CAR-T IN THE BODY".
13. Bispecific antibody bridge
A mechanism figure of a bispecific T-cell engager: one antibody arm binding CD3 on
the T cell, the other arm binding a tumor antigen, pulling the two cells into a
synapse where the T cell releases perforin. Label "CD3 ARM", "TUMOR ANTIGEN ARM",
"T CELL", "TUMOR CELL", "PERFORIN". Title: "BITE BRIDGE".
14. Antigen escape
A relapse-mechanism figure: after CAR-T cells eliminate target-positive leukemia
cells, a few cells that lost the target antigen survive and expand, shown as a
branching population tree with the escape branch highlighted.
Label "TARGET POSITIVE", "TARGET LOST", "CAR-T CELLS", "RELAPSE".
Title: "ESCAPE ROUTE".
Six quick variants
| # | Topic | One-line change |
|---|---|---|
| 15 | Nephron | "A nephron from glomerulus through tubule to collecting duct… Label 'GLOMERULUS', 'BOWMAN'S CAPSULE', 'LOOP OF HENLE', 'COLLECTING DUCT'" |
| 16 | Lung alveoli | "A respiratory bronchiole ending in an alveolar sac with capillary net around each alveolus… Label 'BRONCHIOLE', 'ALVEOLUS', 'CAPILLARY', 'SURFACTANT'" |
| 17 | Digestive system | "A full-length digestive tract figure with organ callouts and one villus inset… Label 'STOMACH', 'SMALL INTESTINE', 'VILLUS', 'LARGE INTESTINE'" |
| 18 | Skeletal muscle | "A muscle cross-section from whole muscle to fascicle to single fiber with myofibril inset… Label 'FASCICLE', 'MUSCLE FIBER', 'MYOFIBRIL', 'SARCOMERE'" |
| 19 | Kidney position | "A torso cross-section showing both kidneys with vessels and ureters… Label 'CORTEX', 'MEDULLA', 'URETER', 'RENAL VEIN'" |
| 20 | Skin layers | "A skin cross-section from epidermis through dermis to hypodermis with hair follicle and gland… Label 'EPIDERMIS', 'DERMIS', 'FOLLICLE', 'SEBACEOUS GLAND'" |
Scientific review checklist
Anatomy doubles the stakes on this list:
- [ ] Are all labels spelled correctly?
- [ ] Are all requested structures present — and nothing mirrored?
- [ ] Are positions, proportions and left/right orientations reasonable against an atlas?
- [ ] Do flow arrows match physiology (blue right heart, red left heart)?
- [ ] Are stages shown in the correct order?
- [ ] Has it been checked against a trusted source?
FAQ
Why do the prompts spell labels in capital letters?
Capital letters render more reliably than mixed case in generated figures, and they read faster at plate size — the same reason road signs are uppercase. The convention also matches classic atlas plates. Mixed-case is fine for captions you typeset yourself; for model-rendered text, capitals are the safe register.
Can I use these diagrams in a nursing or pre-med presentation?
Yes, with the verification pass run honestly — and for anything graded or clinical, at the Corrected level from our verification guide. The heart and neuron prompts above hold up well; the coronal-brain subjects are where atlases earn their keep.
How do I fix a mirrored heart?
Name it: "right atrium on the viewer's left, as in a patient facing the examiner." Mirroring is error #1 and rerolling without the constraint just re-rolls the same dice.
Are these accurate enough for exams?
As drafts, reliably; as final figures, after you've checked each label against your course's reference. The prompts give you the vocabulary your textbook uses, which is the hard part — the checking is five minutes with the book open beside you.
Next
Start from the anatomy presets, run any prompt above, and verify before use. Related: how to verify an AI scientific illustration · 12 common errors and fixes · what is scientific illustration.
<!-- scientific-illustration-cluster-links:start -->
Continue through the scientific illustration collection
Create a scientific illustration · Browse the scientific illustration resource hub
Related: 20 Botanical Illustration Prompts for Flowers, Leaves and Life Cycles · 20 Zoological Illustration Prompts for Fish, Insects, Birds and More
<!-- scientific-illustration-cluster-links:end -->
