Human Body facts, Science for NEET, UPSC

Important Facts of Human Body

In this chapter, we would study only most important things.
All points in this chapter, Obtained from previous exams like UPSC, SSC, NEET and many more others.

All range and number are given below according to normal condition, They may change due to infection, disease and other.

Facts are based on body of adult person.

  • Smallest bone = Stapes.
  • Longest bone = Femur.
  • Total No of Vertebrae = 33.
  • Total no of muscles = 639.
  • Longest Muscle = Sartorius.
  • Emergency Gland = Adrenal.
  • Our nose and ears never stop growing.
  • We make around 1 to 1.6 liters of saliva a day.
  • Monthly cycle period in women = 28 days.
  • It takes about 20 seconds for a red blood cell to circle the whole body.
  • Length of large intestine = 1.5 meter
  • Length of small intestine = 6.25 meter
  • Largest Gland = Liver
  • Largest endocrine gland is thyroid.
  • Highest Rejuvenation = Liver
  • Lowest Rejuvenation = Brain
  • Hardest Part = Enamel of Tooth
  • Largest salivary Gland = Parotid
  • Normal temperature = 98.4 F
  • Highest Open Sensitive Part Male = Penis Head
  • Highest Open Sensitive Part Female = Clitoris
  • Amount of blood = 5.5 liter
  • Amount of WBC = 5000-10000 / cu mm
  • Smallest WBC = Lymphocytes
  • Largest WBC = Monocytes
  • Amount of hemoglobin Male = 13-16 g/dl

Female = 11-14 g/dl

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Amount of hemoglobin may be decrease due to anemia.

  • Life Period of WBC = 120 days
  • Life Period of RBC = 2-5 days
  • Pulse Rate newborn Baby = 140 / m.

1 year = 120 / m.

10 year = 90 / m.

adult = 72 / m.

  • Largest artery = Abdominal aorta.
  • Largest vein = inferior venacava.
  • Weight of brain = 1200-1400 gm.

Kidney = 250 gm.

Liver  =  1200-1800 gm.

  • Total cranial nerves = 12 pairs.
  • Total Spinal nerves  = 31 pairs.
  • Biggest cell = Nerve cells.
  • Longest cranial nerves = Sciatic.
  • Smallest cranial nerves = Trochlear.
  • Blink one eye you move over 200 muscles.
  • Every person has a unique tongue print.
  • Most people blink about 25 times per minute.
  • The human body has 230 movable and semi- movable joints.
  • Humans and dolphins are the only species that have sex for pleasure.

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