Human Body
Your body is a living system built from trillions of cells working together. Explore how it moves, senses, repairs, remembers, defends itself and keeps going without you having to think about most of it.
Built From Cells
Every organ begins with cells, tiny living units that specialise and cooperate.
Bones and Movement
Bones are living structures, and movement happens when muscles pull on them across flexible joints.
Heart and Blood
A nonstop transport network carries oxygen, nutrients, heat and chemical messages to nearly every cell.
Breathing and Oxygen
Every breath connects the air outside your body with microscopic cells deep inside it.
Food Into Fuel
Digestion turns food into molecules small enough to cross into the body and reach its cells.
Brain and Nerves
The nervous system moves information through the body using electrical impulses and chemical signals.
Senses and Perception
Your senses do not simply record the world. The brain builds a useful interpretation from incomplete signals.
Defending the Body
The immune system must recognise danger without attacking every harmless thing that enters the body.
Growing and Repairing
The body is never finished. It grows, repairs damage and constantly remodels itself.
Strange Things Your Body Does
Everyday hiccups, goosebumps and yawns reveal old reflexes and hidden systems working underneath conscious control.