General Knowledge : Science : Some Important Facts of Human Body

Some Important Facts of Human Body

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Some Important Facts of Human Body
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Length of Alimentary CanalApproximately 8 metres
BMR (Basal Metabolic Rate)1600 K. Cal / day
Number of Cells in Body75 trillion
Longest BoneFemur (Thigh bone)
Smallest BoneEar ossicle, stapes
Weight of Brain1400 gms
Blood Volume6.8 litres (in 70 kg body)
Normal B.P 120 / 80 mm Hg
Number of R.B.C (a) In Male : 4.5 - 5.0 million / cubic mm.

(b) In Female : 4.0 - 4.5 million / cubic mm
Life Span of R.B.C 120 days
Normal W.B.C Count5000 - 1000 / cubic mm
Life Span of W.B.C 3 - 4 days


D.L.C. (Differential Leucocyte Count)(a) Basophils : 0.5 - 1%

(b) Eosinophils : 1 - 3%

(c) Monocytes : 3 - 8%

(d)Neutrophils : 40 - 70%

(e) Lymphocytes : 2 - 25%
Blood Platelets Count 2,00,000 - 4,00,000 / cubic mm
Haemoglobin (a) In Male : 14 - 15.6 gm / 100 c.c. of blood

(b)In Female : 11 - 14 gm / 100 c.c. of blood
Hb Content in Body500 - 700 gm
Universal Blood DonorO Rh -ve
Universal Blood RecipientAB
Blood Clotting Time2 - 5 minutes
Average Body Weight 70 kg
Normal Body Temperature 98.4° F or 37° C
Breathing Rate 16 - 20 / minute
Dental FormulaAdult : 2123 / 2123 = 32;

Child : 2120 / 2120 = 22 Milk Teeth
Number of Cranial Nerves12 pairs
Number of Spinal Nerves31 pairs
Largest Endocrine Gland Thyroid
Gestation Period9 months (253 - 266 days)
Normal Heart Beat 72 - 75 / minute
Largest GlandLiver
Largest Muscle in the BodyGluteus maximus (Buttock Muscle)
Largest Smooth MuscleUterus of Pregnant Woman
Smallest Muscle in the BodyStapedius
Largest ArteryAbdominal Aorta
Largest VeinInferior Venacava
Largest W.B.CMonocyte
Smallest W.B.C Lymphocyte
Greatest Regeneration Power In liver
Longest NerveSciatic
Longest CellNeuron (Nerve Cell)
Menstrual Cycle28 days
Menopause Age45 - 50 Years
Minimum Regeneration PowerIn Brain Cells
Minimum Distance for proper vision25 cm
Type of PlacentaHaemochorial (Chorioallantoic)
Pulse Rate 72 / minute
Volume of Semen 2 - 4 ml / ejaculation
Normal Sperm Count200 - 350 million / ejaculation
FSR (normal Erythrocyte Sedimentation rate)4 - 10 min / hr
Thinnest SkinConjunctiva
pH of Gastric Juice 1.4
pH of Urine6.0
pH of Blood7.35 - 7.45
pH of Bile7.5
pH of Pancreatic Juice8.5
Total Number of Muscles in the Body639
Total Number of Bones in the Body206
Largest Organ of Human Body Skin

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Important Facts of Human Body – Facts About Human Body Parts – Largest Organ

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