The shortest ever mature human was Gul Mohammed (India). He was found to be only 57 cm tall when examined in New Delhi in 1990.
The adult body typically contains about 1,200 g m of calcium for which milk is the important source.
An embryo is genderless for the first 6-8 weeks of pregnancy. After that the dominant hormones decide whether the baby will be a boy or a girl.
Cataracts are cloudy spots which develop in the lens of the eye. It is very common among the 20 per cent of people over 60 years.
On an average, we breathe about 13-17 times a minute. If you run hard, you may have to breathe up to 80 times a minute. Newborn babies breathe about 40 times a minute.
Blood flows through the arteries at a speed of 1 m a second and the fastest nerve signals travel at 120 m a second.
Each lung contains more than 300 million alveolus or air bubbles, which have a light and spongy texture. The alveoli provide a huge surface area to absorb oxygen, which would cover half a tennis court if they are flattened out.
The most common infectious disease in the world is the common cold, caused by a group of Rhinoviruses of about 180 types.
The human mouth contains more bacteria than any other orifice in the body.
When an embryo is a week old, its heart 4 starts beating. By the me of 8 weeks old the heart is fully developed.
