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About this tool
Explore the human body with an interactive diagram. Click on organs to learn about their functions, systems, and fascinating facts.
The Human Anatomy Explorer is an interactive body diagram covering 11 organs and structures — brain, eyes, heart, lungs, liver, stomach, kidneys, intestines, bones, muscles and skin — grouped into six systems: nervous, circulatory, respiratory, digestive, skeletal and muscular. Click a region or search by name and the panel gives that organ's description, what it does, and a short set of facts; an educational mode swaps the clinical wording for a simplified explanation. It is built for students, teachers and curious readers, and is general reference material rather than medical guidance.
Open Human Anatomy Explorer on AltFTool — it loads instantly in your browser.
Click a region of the interactive body diagram, or type into Search organs to find the brain, heart, lungs, liver, stomach, kidneys, intestines, bones, muscles or skin.
Narrow the diagram with the body system filters: Nervous, Circulatory, Respiratory, Digestive, Skeletal or Muscular.
Read the selected organ's description, function and facts in the detail panel, and tick Educational mode for the simplified wording.
Six system filters — nervous, circulatory, respiratory, digestive, skeletal, muscular — colour and isolate only the organs that belong to the one you are studying.
Educational mode replaces each organ's technical description with a plain-language one, so the same diagram works for a ten-year-old and a first-year student.
Each organ lists what it is and, separately, what it does, which is the split most homework questions and quizzes actually ask about.
Eleven entries across six systems: brain and eyes (nervous), heart (circulatory), lungs (respiratory), liver, stomach and intestines (digestive), bones (skeletal), muscles (muscular), plus kidneys and skin. Selecting a system filter shows only that group and colour-codes it.
Roughly 5 to 6 litres a minute at rest, driven through the body's blood vessel network — about 100,000 kilometres of them. That works out to around 100,000 beats a day, which is why the heart is described as the hardest-working muscle in the body.
Because signalling between neurons is metabolically expensive. The brain is roughly 2% of body mass but consumes about 20% of the body's oxygen and calories, and it contains on the order of 86 billion neurons in about 1.4 kg of tissue.
No. It is an educational reference that describes normal structure and function; it does not assess symptoms, interpret test results or diagnose anything. If you have a specific concern about pain, breathing, digestion or any other symptom, speak to a doctor or qualified clinician.