How many muscles are there in each finger? A. 5 B. 8 C. 0 D. 12
There are NO muscles in the fingers. The muscles that bend the fingers are located in the palm of the hand & the forearm & are connected to fingers by tendons
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15
Which order of animals has hands? A. Primates B. Marsupials C. Rodents
Primates. The 300 primate species include humans, apes, monkeys, & prosimians (lemurs, lorises and tarsiers)
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15
What are fingernails made of? A. Ivory B. Skin C. Keratin D. Fat cells
Nails are made of keratin, the same substance your body uses to create hair and the top layer of your skin. You had fingernails before you were born.
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15
What percentage of the population is left-handed?
Only 10-15% of the entire human population is left handed.
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15
How many bones are in the human hand? A. 18 B. 12 C. 29 D. 7
There are around 29 major bones in the human hand. That number is not universal. Some people actually have more or less bones than others.
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15
What percentage of bones in the human body are contained in the hand?
About 25%
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15
How many nerve endings are in the hands. A. 3,500 B. 17,000 C. 90 D. 8,000
The palm of the human hand has over 17,000 touch receptors and free nerve endings.
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15
How many muscles control the thumb? A. 2 B. 9 C. 3 D. 10
9 muscles and three nerves control the thumb
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15
What does ambidextrous mean and about what percentage of humans are ambidextrous?
Ambidextrous means being able to use both hands equally well. Only about 1% (1 in 100 people) is ambidextrous.
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15
What part of the hand allows us (and some primates) to grip things?
Our thumb!
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15
When and where do fingernails grow the fastest?
Nails tend to grow at a faster rate during the summertime, and they typically grow faster on a person’s dominant hand.
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15
How many muscles and joints does the human hand have? A. 29 joints/34 muscles B. 15 joints/12 muscles C. 6 joints/8 muscles.
There are 29 joints & 34 muscles in each hand. Also, there are at least 123 ligaments ( connective tissue that holds joints together), 48 nerves & 30 arteries.
