The human brain uses over a quarter of the oxygen used by the body, and as much power as a 10-watt light bulb. Messages from the brain travel along nerves at up to 322 km/h.
A human eye can distinguish between approximately 10 million different colors.
The smallest bone found in the human body is located in the middle ear - the staples (or stirrup) bone is only 2.8 millimetres long. The largest bone is the femur, or thighbone. Bone is five times stronger than a steel bar of the same width, but it is much more brittle and can fracture on impact.
For an adult human, taking just one step uses up to 200 muscles. The strongest muscle in the human body is the masseter, or the jaw muscle; the fastest muscles in a human body are the ones that make the eyes blink.