Amazing Human Body Facts
By Eddie Hung 2014
- 1.How many bones in an adult human?
- A.
68
- B.
120
- C.
206
- D.
317
- 2.Which is the hardest structure in the human body?
- A.
Enamel of the tooth
- B.
Middle of long bone
- C.
Pelvis
- D.
Ear bones
- 3.Which is the smallest bone in the body?
- A.
Last tail bone
- B.
An ear bone called stapes
- C.
The bone inside the nose
- D.
The middle waist bone
- 4.How many bones in the hand?
- A.
5
- B.
13
- C.
36
- D.
54
- 5.How many times faster do the finger nails grow compared to that of toe nails?
- A.
2
- B.
4
- C.
6
- D.
8
- 6.How many cells are there in a human body?
- A.
100 thousands
- B.
100 billions
- C.
100 trillions
- D.
1000 trillion
- 7.How many cells are replaced every hour?
- A.
1000
- B.
10,000
- C.
One million
- D.
One billion
- 8.How much Oxygen is required by an adult human daily?
- A.
900 gm
- B.
8 Kg
- C.
40 Kg
- D.
120 Kg
- 9.What is the total length of all blood capillaries in a human body?
- A.
56 km
- B.
12,800 km (the diameter of the earth)
- C.
100,000 km (2.5 times of the circumference of the arth)
- D.
1 million km
- 10.What is the total surface area of all the air sacs (inside the lungs) in a human body?
- A.
2.74 sq m (size of a table tennis table)
- B.
436 sq m (size of a basketball court)
- C.
18,000 sq m (size of a footy ground)
- D.
70 sq m (size of a tennis court)
- 11.How much blood is filtered to form urine in a day?
- A.
24 litres
- B.
48 litres
- C.
180 litres
- D.
368 litres
- 12.How many cells do each square metre of skin have?
- A.
5500
- B.
12,000
- C.
3.5 millions
- D.
6.8 millions
- 13.What is the length of the small intestine?
- A.
3 m
- B.
6 m
- C.
10 m
- D.
12 m
- 14.What is the total internal surface of the small intestine?
- A.
6 sq m
- B.
60 sq m
- C.
600 sq m
- D.
6000 sq m
- 15.How many bacteria can be found in our large intestine in percentage of dry mass of faeces?
- A.
10%
- B.
25%
- C.
45%
- D.
60%
- 16.What is the amount of saliva produced per day?
- A.
35 ml
- B.
500 ml
- C.
1.7 litres
- D.
2.9 litres
- 17.How many hairs do a person have?
- A.
50,000
- B.
100,000
- C.
450,000
- D.
1 million
- 18.Which organ performs the most number of functions?
- A.
Lung
- B.
Liver
- C.
Thyroid gland
- D.
Breast
- 19.Which is the largest organ in the body?
- A.
Lung
- B.
Small intestine
- C.
Skin
- D.
Diaphragm
- 20.How many facial muscles do you have?
- A.
13
- B.
25
- C.
42
- D.
53
- 21.How many brain cells in a person?
- A.
1 billions
- B.
10 billions
- C.
100 billions
- D.
1 trillions
- 22.How long will red blood cells live?
- A.
56 days
- B.
120 days
- C.
2 years
- D.
Forever
- 23.How many heartbeats do a person have in a year ?
- A.
7200 times
- B.
150,000 times
- C.
1.5 millions
- D.
35 millions
- 24.What is the percentage of the mass of the brain?
- A.
2%
- B.
12%
- C.
22%
- D.
32%
- 25.How much Oxygen is used by the brain?
- A.
2%
- B.
11%
- C.
20%
- D.
32%
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