Competitive Exams: Facts About 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

  • In male: 4.5 − 5.0 million/cubic mm
  • 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)

  • Basophils-0.5 − 1%
  • Eosinophils-1 − 3%
  • Monocytes-3 − 8%
  • Neutrophils-40 − 70%
  • Lymphocytes-2 − 25%

Blood platelets count

2, 00, 000 − 4, 00, 000/cubic mm

Haemoglobin

  • In male: 14 − 15.6 gm/100 c. c of blood
  • 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