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anatomy > anatomy fun facts > Flashcards

anatomy fun facts Flashcards

1
Q

what bone can prove that humans once had tails but evolved

A

tailbone (coccyx)

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2
Q

what percent of bones are in feet

A

25%

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3
Q

what is the longest bone

A

femur

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4
Q

what and where is the smallest bone

A

stapes in the ear

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5
Q

what is the hardest part of the body

A

enamel teeth

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6
Q

how many muscles are in the body

A

600

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7
Q

what percent of body weight do muscles take up

A

40%

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8
Q

how many muscles does it take to smile

A

17

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9
Q

how many muscles does it take to frown

A

43

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10
Q

how many muscles does it take to stare

A

47

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11
Q

what is the largest muscle

A

gluteus maximus

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12
Q

what is the longest muscle

A

sartorius

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13
Q

how many lbs of force can jaw muscles provide for chewing

A

200 lbs

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14
Q

how much ATP does the body produce daily

A

70 kg

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15
Q

what percent of human dry weight comes from bacteria

A

10%

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16
Q

how long does it take nails to grow from base to tip

A

6 months

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17
Q

do fingernails or toenails grow faster

A

fingernails

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18
Q

how many strands of hair do people lose a day

A

40-100

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19
Q

how many hairs does the scalp have

A

100,000

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20
Q

do blondes or brunettes have more hair

A

blondes

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21
Q

how many ft of blood vessels are there in every inch of skin

A

20 ft

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22
Q

how much bacteria are on every square inch of the human body

A

32 million

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23
Q

how do fingerprints allow you to pick things up

A

they provide friction

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24
Q

how many particles are shedded every hour, how many pounds is that a year

A

600,000, 1.5 lbs a year

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25
Q

how often do humans shed and regrow outer skin cells

A

every 27 days

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26
Q

what is the surface area of skin

A

~25 ft^2

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27
Q

how long does the human head remain conscious for after decapitation

A

15-20 sec

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28
Q

about how large is the human’s scent membrane in the nose (comparison with an object)

A

about the size of a postage stamp

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29
Q

how much vision will you lose if you go blind in one eye

A

1/5

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30
Q

how much depth perception will you lose if you go blind in one eye

A

all of it

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31
Q

how heavy is the average brain

A

1.5 kg

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32
Q

who has slightly larger brains, men or women

A

women

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33
Q

what percent of water is the brain made up of

A

85%

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34
Q

how fast can nerves send impulses at

A

360km/hr

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35
Q

how many miles of nerves are in the skin

A

45 miles

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36
Q

how many different smells can the nose smell

A

2000-4000

37
Q

how many different sounds can the ears detect

A

1500

38
Q

how many colors can the human eye detect

A

10,000

39
Q

how wide of an angle can you visualize

A

200 degrees

40
Q

what is the maximum amount of time we blink a day (if it was all combined)

A

30 min

41
Q

how long does it take a cell to make a complete circuit of the body

A

60 sec

42
Q

how many times will your heart have beated by the time you turned 70

A

2 1/2 billion times

43
Q

what is the most common blood type

A

o

44
Q

what is the rarest blood type

A

ab

45
Q

how many miles of blood vessels are there in the body

A

60,000 miles

46
Q

how many liters of blood does the heart pump a day

A

27,949.3 liters

47
Q

how many mph can a cough be released at

A

60 mph

48
Q

how many mph can a sneeze exceed

A

100 mph

49
Q

which lung is smaller, left or right

A

left

50
Q

how much water do we drink in a lifetime

A

16,000 gallons

51
Q

how many times does the average person use the bathroom a day

A

6 times

52
Q

how many hours can a lab test detect traces of alcohol in urine after a person has stopped drinking

A

6-12 hours

53
Q

what organs in the body don’t rest

A

the heart and kidneys

54
Q

how much saliva is produced in a day

A

1.7 liters

55
Q

how much gas does a healthy person release in a single flatulent emission. how much in a day

A

3.5 oz, 17 oz in a day

56
Q

will someone die faster from starvation or sleep deprivation. how long do each take

A

sleep deprivation (takes ~10 days), but starvation takes a few weeks

57
Q

like fingerprints, we also have unique ___

A

tongue prints

58
Q

how long is the small intestine

A

22 ft

59
Q

how much food does the average US citizen eat in a lifetime. how much do they drink

A

50 tons of food, 13,000 gallons of liquid

60
Q

how much hypocaloric acid does the stomach produce daily

A

2 liters

61
Q

how many stomach cells reproduce every minute and why

A

500,000 stomach cells. so the stomach walls aren’t damaged by the acid

62
Q

how many bones are in a baby’s body vs adult

A

300 in babies, 206 in adults

63
Q

one in every ___ babies are born with a tooth

A

2000

64
Q

how long does pregnancy last (conception to birth)

A

~270 days

65
Q

when does a fetus acquire fingerprints

A

3 months

66
Q

what is the largest cell in the human body

A

ovum (egg cell)

67
Q

what is the smallest cell in the human body

A

male sperm

68
Q

how does laughing affect health

A

lowers stress hormones (cortisol) and strengthens the immune system

69
Q

what in the endocrine system influences cells and function of our body

A

glands and the hormones they produce

70
Q

name 4 important glands in the endocrine system

A

hypothalamus, pituitary, thyroid, adrenals

71
Q

what does the pituitary gland secrete

A

growth hormones

72
Q

where do adrenals sit on top of

A

the kidneys

73
Q

more than __ major hormones are secreted by glands in the endocrine system

A

20

74
Q

what signaling pathway is created from endocrine glands

A

endocrine signaling

75
Q

how much fluid is returned each day from the tissues to the circulatory system

A

~3.17 quarts

76
Q

what is the lymphatic system made up of

A

lymph vessels that carry lymph (a protein rich fluid that is transported through lymph vessels), and lymph nodes which filter out germs and toxins

77
Q

how many lymph nodes are throughout the body

A

over 100

78
Q

where are the majority of lymph nodes located

A

neck, groin, armpits

79
Q

how are lymphs transported

A

through the lymphatic vessels and moves via squeezing action of neighboring skeletal muscles

80
Q

what percent of the world is left handed

A

11%

81
Q

1 out of every __ people in the world will die (in 2007)

A

113

82
Q

how many people have the same bday as you

A

~10 million

83
Q

how many calories are you consuming every time you lick a stamp

A

1/10

84
Q

how many chromosomes do humans, peas, crayfish, and chimpanzees and potatoes have

A

46, 14, 200, and 48

85
Q

how many words do women and men say a day

A

women say 20,000 words, but men say 7,000

86
Q

the human body has enough fat to produce __ bars of soap

A

7

87
Q

how many cells wear out and are replaced everyday

A

2 billion

88
Q

what is the only bone not connected to another

A

hyoid

anatomy (1 decks)

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