Some Important Facts of Human Body

 

Some Important Facts of Human Body

 

Length of alimentary canal Approximately 8 meters BMR (Basal metabolic rate) 1600 K.cal/day Number calls in 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 3-4 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 body 500-700 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 98.4.F or 37.C Breathing rate 16-20 minutes 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/ minutes Largest gland Liver Largest muscles in the body Gluteus maximus (Buttock muscle) Largest smooth muscle Uterus of pregnant women Smallest muscles in the body Stapedius Largest artery Abdominal aorta Largest vein Inferior venacava Largest W.B.C Monocyte Smallest W.B.C Lymphocyte Greatest regeneration power In liver Longest nerve Sciatic Longest cell Neuron (nerve cell) Menstrual cycle 28 days Menopause age 45-50 years Minimum regeneration power In brain cell 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