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Gg Flashcards

1
Q

What percentage of the human body is water?

A

The average human body contains about 60% water.

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2
Q

How many neurons are in the human brain?

A

The human brain contains around 86 billion neurons.

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3
Q

How strong are human bones compared to steel?

A

Human bones are about five times stronger than steel.

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4
Q

How much blood does the heart pump daily?

A

The heart pumps about 2,000 gallons of blood every day.

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5
Q

What is the largest organ in the human body?

A

The skin is the largest organ in the human body.

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6
Q

How many bones do humans have in adulthood?

A

Humans have 206 bones in adulthood (babies have 270).

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7
Q

What percentage of body weight does blood make up?

A

Blood makes up about 7-8% of a person’s body weight.

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8
Q

How many colors can the human eye distinguish?

A

The human eye can distinguish about 10 million different colors.

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9
Q

How many particles of skin do humans shed every hour?

A

Humans shed around 600,000 particles of skin every hour.

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10
Q

At what speed can a human sneeze travel?

A

A human sneeze can travel at about 100 miles per hour.

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11
Q

How many different scents can the human nose detect?

A

The human nose can detect over 1 trillion different scents.

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12
Q

Which grows faster, fingernails or toenails?

A

Fingernails grow faster than toenails.

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13
Q

How much iron does the human body contain?

A

The human body contains enough iron to make a 3-inch nail.

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14
Q

Which part of the human body cannot repair itself?

A

Teeth are the only part of the human body that cannot repair themselves.

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15
Q

What is the strongest muscle in the body relative to size?

A

The strongest muscle in the body, relative to size, is the tongue.

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16
Q

How many permanent teeth do humans have?

A

Humans have 32 permanent teeth.

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17
Q

How often does the human stomach produce a new layer of mucus?

A

The human stomach produces a new layer of mucus every two weeks to prevent self-digestion.

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18
Q

How often do human bones regenerate?

A

Human bones constantly regenerate, so every 10 years, you have a brand new skeleton.

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19
Q

Which side of the brain controls the opposite side of the body?

A

The left side of the brain controls the right side of the body and vice versa.

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20
Q

How many cells are in the human body?

A

Your body contains about 37.2 trillion cells.

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21
Q

Do human ears and noses stop growing?

A

Human ears and noses continue to grow throughout life.

22
Q

What is unique to every person?

A

Every person has a unique fingerprint.

23
Q

How many sweat glands does the average adult human have?

A

The average adult human has 2.5 million sweat glands.

24
Q

What is unique about humans regarding blushing?

A

Humans are the only species known to blush.

25
Q

How many hair follicles does the average human head have?

A

The average human head has about 100,000 hair follicles.

26
Q

How many hairs does the human body lose daily?

A

The human body loses about 50-100 hairs a day.

27
Q

How long is the human small intestine?

A

The human small intestine is about 22 feet long.

28
Q

How many muscles are in the human body?

A

There are over 600 muscles in the human body.

29
Q

What percentage of DNA do humans share with chimpanzees?

A

Humans share about 99% of their DNA with chimpanzees.

30
Q

How many breaths does the average human take per day?

A

The average human takes around 20,000 breaths per day.

31
Q

How much blood do humans have?

A

Humans have about 5 liters of blood.

32
Q

What is the fastest-growing tissue in the human body?

A

The fastest-growing tissue in the human body is hair.

33
Q

How many bones are babies born with?

A

Babies are born with 300 bones, but some fuse together over time.

34
Q

What is the relationship between smell and memory?

A

The sense of smell is closely linked with memory.

35
Q

Can the human liver regenerate?

A

The human liver can regenerate itself after damage.

36
Q

How much does the average person’s skin weigh?

A

The average person’s skin weighs around 8-11 pounds.

37
Q

How many times does the heart beat in a day?

A

Your heart beats about 100,000 times a day.

38
Q

How many objects can the human eye focus on every second?

A

The human eye can focus on 50 different objects every second.

39
Q

What is the diameter of the aorta compared to?

A

The body’s largest artery, the aorta, is about the diameter of a garden hose.

40
Q

What percentage of the body’s oxygen and calorie intake does the brain use?

A

The human brain uses 20% of the body’s oxygen and calorie intake.

41
Q

What is unique about humans regarding emotional tears?

A

Humans are the only animals that cry emotional tears.

42
Q

How much saliva does the average person’s mouth produce daily?

A

The average person’s mouth produces about 1 liter of saliva daily.

43
Q

How quiet of a sound can the human ear detect?

A

The human ear can detect sounds as quiet as 0 decibels.

44
Q

How often are taste buds replaced?

A

Your taste buds are replaced every 10 to 14 days.

45
Q

What percentage of body weight does the human skeleton account for?

A

The human skeleton accounts for about 14% of body weight.

46
Q

Does a person’s height change throughout the day?

A

A person’s height changes throughout the day—taller in the morning, shorter by night.

47
Q

How long can humans survive without food and water?

A

Humans are capable of surviving without food for weeks, but without water, only for days.

48
Q

Can the human body survive extreme temperature variations?

A

The human body can survive extreme temperature variations.

49
Q

How many red blood cells does the body produce every second?

A

The body produces millions of red blood cells every second.

50
Q

How much of their lives do humans spend sleeping?

A

Humans spend about one-third of their lives sleeping.

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