#nostr #science

THE HUMAN BODY

1: Number of bones: 206

2: Number of bones of a newborn baby: 306

3: Number of muscles: 639

4: Number of kidneys: 2

5: Number of baby teeth: 20

6: Number of adult teeth: 32

7: Number of ribs: 24

8: Number of heart chambers: 4

9: Largest artery: aorta

10: Normal blood pressure: 120/80 Mm hg

11: Blood pH: 7.4

12: Number of vertebrae in the spine: 33

13: Number of neck vertebrae: 7

14: Number of bones in the middle ear: 6

15: Number of face bones: 14

16: Number of skull bones: 22

17: Number of chest bones: 25

18: Number of arm’s bones: 6

19: Number of arm’s muscles: 72

20: Smaller muscle: stapedius (6 mm)

21: Largest and most resistant bone: femur

22: Number of foot bones: 33

23: Number of bones in each wrist: 8

24: Number of bones in each hand: 27

25: Largest organ: skin

26: Heaviest internal organ and largest gland: liver

27: Largest cell: egg cell

28: Smallest cell: spermatozoon

29: Smallest bone: ossicle of the middle ear

30: Average length of the small intestine: 7 m

31: Average length of the large intestine: 1.5 m

32: Average heartbeat frequency: 72 bpm

33: Normal average body temperature: 37°C (98.4°F)

34: Average blood volume: 4.5 / 5.5 liters

35: Average life span of a red blood cell: 120 days

36: Average life span of a white blood cell: 10/15 days

37: Average life span of a platelet: 5/9 days

38: Average gestation period: 280 days (40 weeks)

39: Largest endocrine cell: thyroid

40: Largest lymphatic organ: spleen

41: Number of chromosomes: 46

42: Averagle blood viscosity: 3.5 / 5.5 cP

43: Universal donor blood type: O

44: Universal recipient blood type: AB

45: Largest white blood cell: monocyte

46: Smallest white blood cell: lymfocite

47: Number of cranial nerves: 12 pairs

48: Number of spinal nerves: 31 pairs

49: Approximate number of cells: ~ 30 trillions

50: Average number of neurons: ~ 86 billions