Some Important Facts Related To Human Body |rlearn education
1) Largest and strongest bone in the body: Femur (thigh bone)
2) Smallest bone in the body: Stapes in ear
3) Number of cells in the body: 75 trillion
4)Volume of blood in the body: 6 litres (in 70 kg body)
5)Number of red blood cells (R.B.C.): In male: 5 to 6 million/cubic mm; In female: 4 to 5 million/cubic mm
6)Life span of red blood cells (R.B.C.): 100 to 120 days
7)Life span of white blood cell (W.B.C.): 3–4 days
8)Normal white blood cell (W.B.C.) count: 5000–10000/cubic mm
9)Time taken by R.B.C. to complete one cycle of circulation: 20 seconds
10)Other name of red blood cell (R.B.C.): Erythrocytes
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11)Largest white blood cells: Monocytes
12)Smallest white blood cells:
Lymphocyte
13)Who discovered blood group: Karl Landsteiner
14)Blood platelets count:
150,000-400,000 platelets per micro litre
15)Haemoglobin (Hb): In male: 14-15 gm/100 c.c. of blood; In female: 11-14 gm/100 c.c. of blood
16)Hb content in body: 500-700 gm
17)pH of urine: 6.5-8
18)pH of blood: 7.36-7.41
19)Volume of semen: 2-5 ml/ejaculation
20)Normal sperm count: 250—400 million/ejaculation
21)Menstrual cycle: 28 days
22)Menopause age: 45-50 years
23)Blood clotting time: 3-5 minutes
24)Weight of brain: 1300-1400 gm in human adult
25)Normal blood pressure (B.P.): 120/80 mm Hg
26)Universal blood donor: 0
27)Universal blood recipient: AB
28)Average body weight: 70 kg
29)Normal body temperature: 37 degree celsius
30)Breathing Rate at rest: 12–16/minute
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31)Number of spinal nerves: 31 pairs
32)Largest endocrine gland: Thyroid gland
33)Gestation period: 40 weeks or 9 calendar months
34)Normal heart beat at rest: 72 beats per minute
35)Largest gland: Liver
36)Largest muscle in the body: Gluteus Maximus or Buttock Muscle
Smallest muscle in the body: Stapedius
37)Largest artery: Aorta
38)Largest vein: Inferior Vena Cava
39)Largest and longest nerve: Sciatic Nerve
40)Longest cell: Neurons (nerve cells)
41)Minimum distance for proper vision: 25 cm
42)Pulse rate: 72 per minute
43)Thinnest skin: Eyelids
44)Weight of heart: 200-300 gm