Important Facts About Human Body:

Largest and strongest Bone in the body:
Femur (thigh bone)
Smallest Bone in the body:
Stapes in ear
Number of Cells in the body:
75 trillion
Volume of Blood in the body
6 litres (in 70 kg body)
Number of Red Blood Cells(R.B.C.):
1. In male: 5 to 6 million/cubic mm
Life span of Red Blood Cells(R.B.C.):
100 to 120 days
Life span of White Blood Cell(W.B.C.):
3 - 4 days
Normal White Blood Cell(W.B.C.) count:
5000 - 10000/cubic mm
Time taken by R.B.C. to complete one cycle of circulation
20 seconds
Other name of Red Blood Cell (R.B.C.):
Erythrocytes
Largest White Blood Cells:
Monocytes
Smallest White Blood Cells
Lymphocyte
Who discovered Blood Group
Karl Landsteiner
Blood Platelets count
150,000 - 400,000 platelets per micro litre
Haemoglobin (Hb)
1. In male: 14 - 15 gm/100 c.c. of blood
2. In female: 11 - 14 gm/100 c.c. of blood
Hb content in body
500 - 700 gm
pH of Urine
6.5 - 8
pH of Blood
7.36 - 7.41
Volume of Semen
2 - 5 ml/ejaculation
Normal Sperm Count
250 - 400 million/ejaculation
Menstrual cycle
28 days
Menopause age
45 - 50 years