Humans have 46 chromosomes, peas have 14 and crayfish have 200.
There are approximately 96,000 km of blood vessels in the human body.
If the lining of mucus were to disappear from your stomach, your stomach would digest itself.
More germs are transferred shaking hands than kissing.
Your heart beats 100 000 times a day.
A foetus only acquires fingerprints at the age of three months..
When you were born, you had 300 bones. Now you have 206, if you are an adult. The rest of the bones have not disappeared – they have merely fused together.
The female egg cell is the largest cell in the human body. It is about 175 000 times heavier than the smallest cell, the male sperm cell.
The average person has about 100 000 scalp hairs.
Enamel, found on our teeth, is the hardest substance in the human body.
The soles of your feet contain more sweat glands and more pressure-sensitive nerve endings per square inch than any other part of your body.
Like fingerprints, every person has a unique tongue print.
The kidneys filter your blood up to 300 times per day.
Human fingers stretch and bend about 25 million times in a normal lifetime.
The human body contains 30 000 billion red blood cells.