Important Facts About Human Body ========================= | FREE JEE NEET NOTES

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