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.

The coloured part of the eye is called the iris. Behind the iris is the soft, rubbery lens which focuses the light on to a layer, called the retina, in the back of the eye. The retina contains about 125 million rods and 7 million cones. The rods pick up shades of grey and help us see in dim light. The cones work best in bright light to pick up colours.

Your mouth produces 1 litre (1.8 pints) of saliva a day.

Over the last 150 years the average height of people in industrialised nations increased by 10 cm (4 in).

In the Middle Ages the length from the tip of the middle finger to the elbow was called an ell.

Fingernails grow nearly 4 times faster than toenails.

The tallest nation in the world is the Watusis of Burundi.

A typical athlete’s heart churns out 25 to 30 litres (up to 8 gallons) of blood per minute.

About 13% of people are left-handed. Up from 11% in the past.

The human head contains 22 bones.

Men loose about 40 hairs a day. Women loose about 70 hairs a day.

Approximately 44 million tons of bananas are produced annually, compared to more than 60 million tomatoes. Apples are the third most popular (36 million tons), then oranges (34 million tons) and watermelons (22 million tons).

The term “soda water” was coined in 1798.

China uses 45 billion chopsticks per year. 25 million trees are chopped down to make’em sticks.

The scientific term for the common tomato is lycopersicon lycopersicum, which means “wolf peach.”

The first ice-cream soda was sold in 1874 in the US.

If the amount of water in your body is reduced by just 1%, you’ll feel thirsty.

The muscle that lets your eye blink is the fastest muscle in your body. It allows you to blink 5 times a second. On average, you blink 15 000 times a day. Women blink twice as much as men.

The length from your wrist to your elbow is the same as the length of your foot.

On average a hiccup lasts 5 minutes.

If all your DNA is stretched out, it would reach to the moon 6,000 times.