If you already attened exams like CSIR, ICMR, GATE, DBT NET JRF you will always come across questions about our own body system like how many bones are in our body, what is length of the intestine and many more here you will list of facts about our own 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 |
