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20 Cards in this Set
- Front
- Back
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How many sweat glands does the average person have? |
2.6 millon: Those 2.6 million sweat glands are distributed all over the body, excepting the lips, nipples and genitals |
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Are there more bones in the hand or the foot? |
Hand: The hand sports 27 bones, barely edging out the foot's 26 bones. |
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What do a blood vessel, bladder and an airway have in common? |
They are all smooth muscles that contract involuntarily: Michael Jackson sang about smooth criminals, but blood vessels, bladders and airways are smooth muscles. |
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How does blood enter the heart? |
Superior vena cava and inferior vena cava: No blood gets into the heart without passing through the superior vena cava and the inferior vena cava first. |
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Which of the following is not an axial bone? |
Shoulder: The shoulder is an appendicular bone, which means it was made to move. Those bones are connected to axial bones like the cranium, spine and ribs, which form the axis of the body and protect delicate organs. |
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If you were to stretch out your entire digestive system, how long would it be? |
30 feet (9 meters): Thirty feet. The intestines count for most of it. |
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What is brown fat? |
Fat tissue found mostly in newborn babies that helps them make heat: Adult humans have little to no brown fat, the presence of which helps keep babies warm. |
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The human brain is a lot larger than most other mammalian brains due to the growth of what brain section? |
Cerebral cortex: Human brain growth is attributed to a larger cerebral cortex, which is charged with tasks including memory, thought processes and motor functions. |
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What are the three basic parts of a neuron? |
Cell body, Axon, Dendrite: The brain consists of more than 100 billion nerve cells called neurons, each of which comes equipped with a cell body, axon and dendrite. |
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What is the most common blood type? |
O+: More than a third of the U.S. population has type O+ blood. |
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At birth, how many bones do you have? |
350: We start off life with 350 bones. However, bones fuse together as we grow, leaving an adult with only 206 bones. |
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How much saliva does an average person produce in a lifetime? |
25,000 quartsIn a lifetime: The average person produces enough saliva to fill a couple of swimming pools -- 25,000 quarts! |
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Which of the following is NOT a type of stem cell? a) Umbilical stem cell b) Fetal stem cells c) Fat stem cell |
Fat stem cells: There are typically four types of stem cells: embryonic, fetal, umbilical and adult stem cells. |
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Why does your nose run when you are crying? |
Tear ducts drain into the back of the nose: Get your tissues! Your nose begins to run because tear ducts drain into the back of the nose. |
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How many hair follicles are on the average human head? |
100,000: The lighter the hair, the more hair follicles are present on the human head. However, on average, the human head has about 100,000 hair follicles. |
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How many muscles control your eyeballs? |
Six: Your eyeballs are controlled by six muscles. This enables you to look up, down, left and right. |
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What is the Adam’s apple? |
Protruding thyroid cartilage on the larynx: The Adam’s apple is cartilage found on the larynx. This protruding cartilage is often more noticeable in men. Researchers say that the larger the Adam’s apple, the deeper the voice. |
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If we were to stretch out the blood vessels from end to end, how many miles will blood travel? |
60,000 miles (96,561 kilometers): Blood has a long road to travel! There are about 60,000 miles (96,561 kilometers) of blood vessels in the human body. |
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Where is your heart really located? |
Middle of the chest, slightly to the left: Although we often hold the left side of our chest when saluting the flag, our heart is actually slightly to the left in the middle of the chest. |
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What is the average thickness of human skin? |
2 mm: The human skin’s thickness averages just 2 millimeters. Your skin gets an eighth of all your blood supply. |
