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- Enamel is hardest substance in the human body.
- One brain cell may be connected to as many as 25,000 other brain cells.
- Through blinking we spend about half an hour of our waking day with our eyes closed.
- The thigh bone, called femur is the longest and the largest bone in our body.
- The smallest bone is the stirrup bone in the middle ear.
- The coronary heart disease is the most common cause of sudden death.
- The size and shape of a person’s nose can affect his or her voice.
- It takes about 17 muscles to smile, but about 43 to frown.
- Liver is the largest organ in our body, weighing about 1.6 kg.
- Each day our heart beats normally over 1, 00,000 times.
- Most people have 12 pair of ribs. But one out of every 20 people has at least one extra pair.
- The hair on our head usually lives for 2-6 years before dropping out.
- Our eyelids have the thinnest skin on our body (1 mm thick) while our soles have the thickest skin (about 3 mm thick).
- Each side of the brain controls opposite side of the body.
- An average man has about 5.5 liters of blood.
- The fastest muscles on our body are those that blink the eyelids.
- We can blink as fast as 200 times per minute.
- There are 206 bones in our skeleton. A new-born baby has 300 bones, out of which 94 bones join together as he or she grows.
- Blinking helps to wash tears over our eyeballs. That keeps them clean and moist.
- Fingernails grow nearly 4 times faster than toenails.
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