The human body
From cells to organ systems, and how the body keeps itself in balance.
Human Biology8 steps
Steps
Take the steps in order or jump to any of them. Readings link to the labs and sources behind them, and the quiz at the end is graded on our server.
- Cells of the human bodyStep 1: Read, 50 XP
- Organ systemsStep 2: Read, 50 XP
- HomeostasisStep 3: Read, 50 XP
- Heart and circulationStep 4: Read, 50 XP
- Lungs and breathingStep 5: Read, 50 XP
- KidneysStep 6: Read, 50 XP
- Cell ExplorerStep 7: Lab, 100 XP, once per lab
- The human bodyStep 8: Quiz, up to 250 XP
About human biology
Human biology explores how the body works, from cells to organs like the heart, lungs and kidneys.
It covers anatomy and physiology: how organ systems such as the circulatory, respiratory, digestive and urinary systems work together to keep the body stable.
The field links cell counts, tissue organization and organ physiology with homeostasis, genetics, the microbiome and human evolution.