On average, people can hold their breath for about one minute. The world record is 15 minutes 2 seconds, by Tom Sietas..

After a certain period of growth, hair becomes dormant. That means that it is attached to the hair follicle until replaced by new hair.

The liver is the largest of the body’s internal organs. The skin is the body’s largest organ.

Our eyes are always the same size from birth.

Approximately two-thirds of a person’s body weight is water. Blood is 92% water. The brain is 75% water and muscles are 75% water.

Hair on the head grows for between two and six years before being replaced. In the case of baldness, the dormant hair was not replaced with new hair.