Hello Aspirants.
Here we have given some important facts of Biology. We hope it will help you to know about biology and to score more marks in General science.

  • Length of Alimentary Canal Approximately-  8 metres.
  • BMR (Basal Metabolic Rate) – 1600 K. Cal / day.
  • Number of Cells in Body 75 trillion
  • Longest Bone Femur (Thigh bone).
  • 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 – 1000 / cubic mm
  • Life Span of W.B.C : 3 – 4 days
  • 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 / minute
  • Dental Formula Adult : 2123 / 2123 = 32;
  • Child : 22 Milk Teeth
  • 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 Artery:  Abdominal Aorta
  • Largest Vein:  Inferior Venacava
  • Largest W.B.C : Monocyte
  • Smallest W.B.C : Lymphocyte
  • Longest Nerve : Sciatic
  • Longest Cell : Neuron (Nerve Cell)
  • Menstrual Cycle : 28 days
  • Menopause Age : 45 – 50 Years
  • Minimum Distance for proper vision : 25 cm
  • Pulse Rate 72 / minute.
  • Normal Sperm Count 200 – 350 million / ejaculation.
  • FSR (normal Erythrocyte Sedimentation rate) 4 – 10 min / hr
  • pH of Gastric Juice : 1.4
  • pH of Urine : 6.0
  • pH of Blood: 35 – 7.45
  • pH of Bile : 7.5
  • pH of Pancreatic Juice : 8.5
  • Total Number of Muscles in the Body: 639
  • Total Number of Bones in the Body : 206
  • Largest Organ of Human Body:  Skin