Generate a random bone from 102 named bones of the human skeleton, filterable by region -- each with the landmark or the fact that makes it worth remembering.
An adult has 206, but a newborn has closer to 270 -- the difference is not bones lost, it is bones fusing. The skull starts as separate plates with gaps between them so the head can compress on the way out and then grow; the sacrum starts as five vertebrae and finishes as one wedge; the two halves of the frontal bone usually join before a child's second birthday. Even 206 is a convention rather than a fact, because sesamoid bones grown inside tendons vary from person to person and are not all counted. The distribution is lopsided: 106 of the 206 are in the hands and feet, and 24 are ribs, which leaves surprisingly few for everything else. Bone itself is living tissue with its own blood supply, rebuilt continuously throughout life -- roughly a tenth of the adult skeleton is replaced every year, so the skeleton you have now is not the one you had a decade ago.
This generator draws from 102 named bones of the adult skeleton, grouped into skull and face, spine, ribs and sternum, arm and hand, and leg and foot. Vertebrae and ribs are listed individually rather than lumped together, because each one has its own landmark worth knowing -- T4 meets the sternal angle where the trachea forks, L4 sits level with the top of the hip bones where the aorta divides. Bones that come as a symmetric pair are listed once.
Every result here is drawn using crypto.getRandomValues() -- the Web Crypto API's cryptographically secure randomness -- instead of Math.random(), so it's genuinely unpredictable, not just statistically random. Learn more.
Anatomy revision and self-testing, medical, nursing and physiotherapy exam prep, drawing and sculpture reference, quiz and flashcard writing, and picking a random bone to look up properly.
Generate draws one bone at random from 102 with cryptographically secure randomness, never repeating what is already on screen in single-result mode. Filter to a region to revise one part of the skeleton at a time, and set the amount higher to deal yourself a whole test's worth at once -- with No Duplicates on, none will repeat.
A sample of what this generator can draw, spread evenly across the full list:
Because 206 counts bones, and this counts names. Every symmetric pair -- two femurs, two clavicles, eight of each carpal across two wrists -- is one entry here, since there is nothing to say about a left femur that is not also true of the right.
Yes, all 24 of them individually plus the sacrum and coccyx, because each level really does have its own landmark. C7 is the bump at the base of the neck, T10 is where the oesophagus pierces the diaphragm, L1 is roughly where the spinal cord itself ends.
The stapes in the middle ear is about 3mm long and the smallest in the body; the femur is the longest, heaviest and strongest. Both are in this list, and so are the other two ear ossicles and the hyoid -- the one bone that touches no other bone at all.
That is what the amount control and No Duplicates are for. Draw 20 bones at once, cover the descriptions, and work through them; each result carries a one-line fact about that bone rather than only its name.