TNPSC GROUP 4 – SCIENCE (ZOOLOGY)

TNPSC GROUP 4 – SCIENCE (ZOOLOGY)

In the tnpsc group 4 exams, science subject plays an important role in results of success. Because 20 or more questions came from the science. Here tnpscwinners provides the some basic facts of human body. As a result deciding factor, science related things, will here provided.

SCIENCE CIRCULATORY SYSTEM – TNPSC

The circulatory system plays a major role in human body. Therefore, it is one of important thing in exams. Here  tnpsc winners gives some information about the circulatory system of human body. It will be more useful in the tnpsc group 4 exams, group 2 exams and more.

  • Blood volume = 6.8 litres (in 70 kg body)
  • Normal BO = 120/80 mm Hg
  • Number of RBC = in male, 4.5 – 5.0 million/cubic mm and in female, 4.0 – 4.5 million/cubic mm
  • Life span of RBC = 120 days
  • Normal WBC count = 5000 – 10000 / cubic mm
  • DLC (Differential Leucocyte Cycle)
    • Basophils = 0.5 – 1%
    • Eosinophils = 1 – 2%
    • Monocytes = 3 – 8%
    • Neutrophils = 40 – 70%
    • Lymphocytes = 2 – 25%
  • Blood platelets count = 200000 – 400000 / cubic mm
  • Haemoglobin = in male, 14–15.6 gm/100 cc of blood and in female, 11–14 gm/100 cc of blood
  • Hb content in body = 500 – 700 gm
  • Largest artery = abdominal aorta
  • Largest vein = inferior venacava
  • Universal blood donor = O
  • Universal blood recipient = AB
  • Blood clotting time = 2 – 5 minutes
  • Normal heart beat = 72 – 75 / minute
  • Largest WBC = Monocyte
  • Smallest WBC = Lymphcyte
  • ESR (normal erythrocyte dsedimentation rate ) = 4.10 min/hr
  • pH of Blood = 7.35 – 7.45

DIGESTIVE SYSTEM – TNPSC SCIENCE

  • length of alimentary canal = approximately 8 metres
  • BMR (Basal Metabolic Rate) = 1600 Kcal / Day
  • Dental Formula = adult (2123/2123 = 32), child (2120 / 2120 = 22 milk teeth)
  • Volume of hydrochloric acid produced per day = 2 litres
  • pH of gastric juice = 1.4

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