Human Body and Number

Number of bones ........................................ 206
Number of muscles ..................................... 639
Number of ribs .............................................. 24
Number of bones in skull .............................. 22
Number of bones in neck ............................... 7
Number of bones in face ............................... 14
Number of cranial nerves ......................12 pairs
Number of spinal nerves .......................31 pairs
Number of heart beat ........... 70-72 times/minute
Respiratory rate ................... 16-20 times/minute
Rate of blood pressure ........................... 120/80 mm. Hg.
Number of RBC's ................. in male - 5,000,000/Cu. m.m.
in female - 45,000,000/Cu. m.m.
Life span of RBC ............................................. 120 days
Life span of WBC ........................................... 2-15 days
Amount of blood ............................................. 5-6 litres
Average amount of haemoglobin .. 14-15 mg/100 ml blood
Weight of brain .................................................. 1.4 kg.