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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
2. In female: 4 to 5 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
Blood clotting time:3-5 minutes
Weight of Brain:1300-1400 gm in human adult
Normal Blood Pressure (B.P.):120/80 mm Hg
Universal blood donor:O
Universal blood recipient:AB
Average body weight:70 kg
Normal body temperature:37 degree celsius
Breathing Rate at rest:12-16/minute
Number of Spinal Nerves:31 pairs
Largest Endocrine Gland:Thyroid gland
Gestation period:40 weeks or 9 calendar months
Normal Heart Beat at rest:72 beats per minute
Largest Gland:Liver
Largest Muscle in the body:Gluteus Maximus or Buttock Muscle
Smallest Muscle in the body:Stapedius
Largest Artery:Aorta
Largest Vein:Inferior Vena Cava
Largest and longest Nerve:Sciatic Nerve
Longest Cell:Neurons (nerve cells)
Minimum distance for proper vision:25 cm
Pulse rate:72 per minute
Thinnest Skin:Eyelids
Weight of Heart:200-300 gm