Images · Diagrams, micrographs, illustrations
Look closely. Then hide the labels and test yourself.
Clear labelled diagrams and real images from under the microscope. Every image says what it shows, where it came from and how you may use it.
01 · Viewer
Animal cell
A typical animal cell: the nucleus holds DNA, mitochondria release energy from food, and the membrane controls what enters and leaves.
Hide the labels, name each part, then show them again to check.
02 · Gallery
Every image, ready to study.
- MICROGRAPH BIOLOGY
Onion skin cells
- MICROGRAPH BIOLOGY
Red blood cells
- MICROGRAPH CHEMISTRY
Table salt crystals
- PHOTO CHEMISTRY
Flame test colours
- ILLUSTRATION BIOLOGY
The carbon cycle
- ILLUSTRATION BIOLOGY
Stages of mitosis
Made for classrooms and revision.
Each image has its own licence. Check the panel beside the image before you reuse it, and always give the credit shown.
Drawn to be correct
Diagrams are checked by a subject reviewer, like every guide.
Credit on every image
Each one names its maker, source and licence.
Labels on or off
Show labels to learn, hide them to test yourself.
Described for everyone
Every image has a text description for screen readers.
Questions about images and diagrams
- Diagrams are drawn by ScienceTheGuide and reviewed by subject specialists. Each one names its checker and date. For reference anatomy diagrams see Kenhub; for cell biology images see the Molecular Biology of the Cell image library (NCBI).
- Yes, for non-commercial educational use. Check the licence panel beside each image for exact terms and always use the credit shown. For open-access scientific images see NIH Flickr and the Wikimedia Commons biology category.
- Micrographs are photographs taken through a microscope. Electron micrographs use an electron beam instead of light and can resolve structures smaller than 1 nm. For a full explanation of microscopy techniques see Nikon MicroscopyU or the Biochemistry textbook cell imaging chapter (NCBI).
- Use the "Show labels" / "Hide labels" toggle button in the viewer. This lets you test yourself without seeing the answers first — a retrieval practice technique shown to improve long-term retention in APA memory research and The Learning Scientists.
Need a diagram we don't have?
Tell us which structure or process you want to see drawn, and we will add it to the list.