Our body is a wonderful machine which is made up of skeleton (bones) and muscles (flesh). Although it is more complicated than any other machines - man has yet been able to know about it.
It is indeed such a machine which repairs its own broken parts, lubricates its own joints, works for years together without getting worn away and can do jobs which require brute force like boxing or which require delicate movements like writing a poem. It performs a number of functions such as: it grows, feels, smells, moves, runs, jumps, dances, talks, laughs and even cries. Man is called Ashraful Makhlukat ( the best of all creations). This is only because of his brain; among all creatures man’s brain is the most developed one. By dint of his imaginative and creative thinking, man has been dominating over all other creatures. It is matter of great interest and astonishment that man is the only animal with rationality that can lie on his back (some apes also).
There are some interesting things in a human body as follows:
1: Human brain weighs -1.5 kg.
2: The size of heart is -12 cm (L) x cm (W) x 6cm (T).
3: The weight of heart -300gm (male), 250gm (female).
4: The size of kidney -12 cm, (L) x 6cm) (W) x 3cm (T).
5: The weight of each kidney -150 gm.
6: Length of food -pipe-25cm.
7: Length of digestive system from mouth to anus-75cm.
8: The skeleton has-206 bones.
9: The backbone has -33 bones.
10: The skull has-29 bones.
11: The largest bone-Femur (in leg).
12: The smallest bone-Stirrup (3mm: in ear).
13: A human body contains 5 to 6 liters of blood.
14: The number of red blood cells in per ml -5 million.
15: In an average life time the hearts beats 2500 million times.
16: In an average life the heart pumps 340 million liters of blood.
17: The heart beats about 75 times in a minute (while resting).
18: The heart beats about 140 times in a minute (during exercise).
19: The number of sweat glands in skin is 2.5 to 3 million.
20: In hot weather a man can lose up to 12 liters of water and 30 gm of salt.
21: A man may die within 2 minutes after the heart blocks.
22: A man may die if blood is not circulated for 5 minutes.
23: A man may die if breathing in and breathing out remains stopped for 3.5 minutes.
24: A man may die within 12 to 14 minutes if both kidneys are separated from his body.
25: The human lungs have an internal surface area equivalent to a tennis court (singles).
26: The total length of blood vessels in a human body-100,000 km.
27: Human brain contains more then 10,000,000 nerve cells.
28: The name of blank space of the brain ventricle.
29: To be as much powerful as one’s brain a computer would have to weigh 10 tones.
30: The brain can deal with 50 million signals in each second.
31: The total number of muscles in human body is 600.
32: For taking one step we use 100 muscles.
33: To speak every word it requires 72 muscle.
34: If all muscles in the body were able to pull in the same direction at the same time then it could lift tones.
35: The liver is the biggest internal organ which is to the right of the stomach.
36: The number of moveable joints in skeleon-70.
37: The diameter of moveable joints in skeleton 70.
38: Thairoid gland weighs-1 oz.
39: The hardest substance in a human body is tooth enamel.
40: Genes control the development of inherited characteristics (eye color, hair color, the shape of nose, mouth, ears) etc.
41: The number of chromosome in human cell-23 pair.
42: The size of a gene is-l/2u.
43: The size of stomach-25cm (L) x 15cm (W).
44: The length of gall bladder-7 to 8 cm.
45: The size of pancreas-20cm (L) x 5cm (W).
46: The thorax (heart-case) has 12 pair of ribs.
47: The largest organ of human body is skin and its area is-2.8 square meter.
N.B: The measurements mentioned here is to be considered in case of an adult person.
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