Human Body – Some Interesting Facts!

• 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.