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.) In male: 5 to 6 million/cubic mm 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): In male: 14-15 gm/100 c.c. of blood 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 Pulse rate: 72 per minute Thinnest Skin: Eyelids Weight of Heart: 200-300 gm 39 views17:51
