Posted : 7 years ago

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.

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Posted : 7 years ago

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.

Posted : 8 years ago

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.