If you were to lay out all the blood vessels in the human body end to end, they would stretch over 60,000 miles. That's enough to circle the Earth more than twice!

32 41

38 42

44 12

35 22

23 42

30 40

21 13

28 5

26 12

52 45

32 21

68 20

30 22

40 12

38 21

25 42