Anatomy of the human body
What is inside you, and where exactly does it all sit?
A guided tour of the body: bones that hold you up, muscles that move you, and the organs packed inside — what each one is, where it sits, and how big it really is.
5 depths≈ 194 min of reading79 practice questions
The ladder
Choose how deep to go
Every depth is open. Start where it feels interesting — you can always move back.
- Discoverabout 38 minA guided tour of the body you live inClimb the ladder from cells to organ systems, learn the words anatomists use for where things are, meet the 206 bones and their joints, find out why a muscle can only ever pull, and take an organ-by-organ tour with real sizes and positions — then measure your own body.Owner-accepted · not line-by-line reviewed
- Understandabout 42 minHow the body is put togetherGo one level below the organs to the four tissue types they are built from, learn the direction words and the standard pose they are measured from, see why bone is a living composite, count the skeleton to 206, and place every major organ in its cavity with its mass.Owner-accepted · not line-by-line reviewed
- Investigateabout 36 minPredict it, then test itGuess before you look: does a hollow tube beat a solid rod, does height equal arm span for everyone, can a bone reveal a stranger’s height, does exercise raise every pulse equally, are you really symmetric, and does your shoulder really out-move your hip? Seven hands-on tests against real evidence.Owner-accepted · not line-by-line reviewed
- Go deeperabout 40 minWhy it works: levers, remodelling and a history of being correctedTreat every muscle-moved bone as a lever and see why the body favours the class that trades force for speed. Meet bone that rebuilds along its real loads, the genuine edge cases in "206 bones", and how Vesalius corrected centuries of Galen’s animal-based errors.Owner-accepted · not line-by-line reviewed
- Extendabout 38 minBeyond the syllabus: animals, projects, puzzles and careersCompare your body plan with a giraffe, a bird, a snake and a boneless octopus; build a working paper hand and a life-size organ map; solve puzzles spanning the whole topic; meet seven careers built on this knowledge; finish with open questions.Owner-accepted · not line-by-line reviewed
Practise and apply
Question bank · 79 questions
10 sections from Foundation to Challenge, each with hints and a worked solution — or play a 10-question round for points and stars.
Foundation 22Core 32Stretch 15Challenge 10
The web
Connected ideas
Follow a connection when you’re curious — some lead into completely different areas.
Anatomy of the human body
Usesanother area
SoundThe ear turns shaking air into signals a nerve can carry: a drum, three tiny bones and a spiral of fluid.
Helps you understand
Body systems and how they connectOnce you know where each organ sits, you can follow how they pass work to each other.
Used inanother area
Data handlingHeart rate, height and lung capacity across a class are real data to collect, average and compare.
Words to know
40 words are explained in these lessons
celltissueorganorgan systemanatomyanteriorposteriorcavitysymmetryorgan pairanatomical positionsuperior+28 more