Some Important Facts of Human Body: Science

Today, In this list/table, we are going to share with you the incredible facts about the human body. For example, did you know that children can only see in black and white? Or that one of your hairs can stay on your head for 7 years? The human body is attractive and we are going to share it with you.

Important Facts of Human Body

The only part of the body that has no blood supply is the 'cornea' of the eye. It receives oxygen directly from the air. The human brain has a memory capacity which is the equivalent of more than four terabytes on a hard drive.

The human body is an extremely complex and elaborate system and it still baffle researchers repeatedly despite thousands of years of medical awareness.

List/table of Important Facts of Human Body:

#ParticularDescription
1.Length of alimentary canalApproximately 8 metres
2.BMR (Basal metabolic rate)1600 K. Cal/day
3.Number of cells in body75 trillion
4.Longest boneFemur (Thigh bone)
5.Smallest boneEar ossicle, stapes
6.Weight of brain1400 gms
7.Blood volume6.8 litres (in 70 kg body)
8.Normal B.P.120/80 mm Hg
9.Number of R.B.C.(a) In male: 4.5-5.O million/cubic mm
(b) In female: 4.0-4.5 million/cubic mm
10.Life span of R.B.C.120 days
11.Nomal W.B.C. count5000-1000/cubic mm
12.Lite span of W.B.C.3-4 days
13.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%
14.Blood platelets count2,00,000-4,00,000/cubic mm
15.Haemoglobin(a) In male: 14-15.6 gm/100 c.c. of blood
(b) In female: 11-14 gm/100 c.c. of blood
16.Hb content in body500-700 gm
17.Universal blood donor'O' Rh-ve
18.Universal blood recipientAB
19.Blood clotting time2-5 minutes
20.Average body weight70 kg
21.Normal body femperature98.4° F or 37° C
22.Breathing rate16-20/minute
23.Dental formulaadult: 2123/2123 = 32,
child: 2120/2120 = 22 milk teeth
24.Number of cranial nerves12 pairs
25.Number of spinal nenves31 pairs
26.Largest endocrine glandThyroid
27.Gestation period9 months (253-266 days)
28.Normal heart beat72-75/minute
29.Largest glandLiver
30.Largest muscle in the bodyGluteus maximus (Buttock muscle)
31.Largest smooth muscleUterus of pregnant woman
32.Smallest muscle in the bodyStapedius
33.Largest arteryAbdominal aorta
34.Largest veinInterior venacava
35.Largest W.B.C.Monocyte
36.Smallest W.B.C.Lymphocyte
37.Greatest regeneration powerIn liver
38.Longest nerveSciatic
39.Longest cellNeuron (nerve cell)
40.Menstrual cycle28 days
41.Menopause age45-50 years
42.Minimum regeneration powerIn brain cells
43.Minimum distance tor proper vision25 cm
44.Type of placentaHaemochorial (Chorioallantoic)
45.Pulse rate72/minute
46.Volume ot semen2-4 ml/ejaculation
47.Normal sperm count200-350 million/ejaculation
48.ESR (normal Erythrocyte sedimentation rate)4-10 min./hour
49.Thinnest skinConjunctiva
50.pH of gastric juice1.4
51.pH of urine6.0
52.pH of blood7.35-7.45
53.pH of bile7.5
54.pH of pancreatic juice8.5
55.Total number of muscles in the body639
56.Total number of bones in the body206
57.Largest organ of human bodySkin
Important Facts of Human Body