Facts about Human Body

Facts about Human Body
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Length of alimentary canal – 8 metres approx
BMR – 1600 K. Cal/day
Number of cells in the body – 75 trillion
Longest bone – Femur (Thigh Bone)
Smallest bone – Ear ossicle, Stapes
Weight of brain – 1400 gms
Blood volume – 6.8 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 count – 5000 – 10000/ cubic mm
Life span of W.B.C – 3 to 4 days
D.L.C (Differential leucocyte count) – a)Basophils – 0.5 – 1% b)Eosinophild – 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 – 15.6gm/100 c.c. of blood
b)In Female – 11-14 gm/100 c.c. of blood
Hb content in body – 500 to 700 gm
Universal blood donor – O Rh –ve
Universal blood recipient – AB
Blood clotting time – 2-5 minutes
Average body weight – 70 Kg
Normal body Temperature -98.4⁰ F or 37⁰C
Breathing rate – 16 -20/minute
Dental formula – adult : 2123/2123 = 32; child : 2120/2120 = 22 milk teeth
Number of cranial nerves – 12 pairs
Number of Spinal nerves – 31 pairs
Largest Endocrine gland – Thyroid
Gestation Period – 9 months (253-266 days)
Normal Heart beat – 72-75/minute
Largest gland – Liver
Largest muscle in the body – Gluteus maximus (Buttock muscle)
Largest smooth muscle – Uterus of pregnant woman
Smallest muscle in the body – Stapedius
Largest artery – Abdominal aorta
Largest vein – Inferior venacava
Largest W.B.C – Monocyte
Smallest W.B.C – Lymphoyte
Greatest regeneration power – In liver
Longest nerve – Sciatic
Longest cell – Neuron (nerve cell)
Menstrual cycle – 28 days
Menopause – 45-50 days
Minimum regeneration power – in brain cells
Minimum distance for proper vision – 25 cm
Type of Placenta – Haemochorial (Chorioallantoic)
Pulse rate – 72/minute
Volume of semen – 2-4 ml/ejaculation
Normal sperm count – 200 -350 million/ejaculation
ESR(normal Erythrocyte sedimentation rate) – 4.10 min/hour
Thinnest skin – Conjunctiva
pH of gastric Juice – 1.4
pH of Urine – 6.0
pH of Blood – 7.35-7.45