Pg.no. 148
12. Adults excrete about a quarter and a half (1.42 liters) of urine each day.
13. The human brain contains about 100 billion nerve cells
14. Water makes up more than 50 percent of the average adult's body weight
15. Fingernails often grow more quickly than toenails.
16. If you measure the distance between your wrist and your elbow, that will be about the
same as the length of your foot.
17. Your heart beats over 100,000 times a day!
18. The largest organ inside our body is the liver.
19. Your funny bone isn’t really a bone at all – it’s a nerve at your elbow, which is why you
feel all tingly when you accidentally hit it.
20. The parts of you arm are – hand (and fingers), wrist and elbow. Your arm connects to
your body at your shoulder.
21. The parts of your leg are – foot (and toes), ankle, shin, knee and thigh. Your leg connects
to your body at your hip.
22.The parts of your face are – forehead, eyes, ears, cheeks, nose and mouth
Because we’ve got two ears, eyes, arms, hands, legs and feet, we use ‘left’ and ‘right’ to tell
them apart.
23. There are about 6,50,00,000 cells in the Human Body.
24. By studying rocks and meteorites (rocks from space), scientists believe the Earth is about
4.5 billion years old!