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Medical Health Trivia, Human Anatomy Facts, Medical General Knowledge Trivia

Medical Health Trivia, Human Anatomy FactsHuman body is the most complex machine in the world that is full of wonder. We see with it, hear with it, breathe with it, walk and run with it, and sense pleasure with it. Its bones, muscles, arteries, veins and internal organs are organized with marvelous design, and when we examine this design in detail we find even more amazing facts. Every part of the body, though each may seem to be so different from another, is made up of the same material called - cells.

Cells, each of which is one thousandth of a millimeter, are the structural units that form our body and everything in it. Some of these cells unite to form bones, others to form nerves, the liver, the inner layer of the stomach, the skin or the cornea of the eyeball. Each has the size and shape that exactly meet the requirement of that part of the body.

At this moment, there are trillions of cells in our body that are at our service. All of them carry out a great number of processes, voluntarily without our even being aware of them. Here is a collection of interesting facts and figures about medical health trivia - ranging from human anatomy facts to medical general knowledge gathered from various resources.

Medical Health Trivia: Human Brain and Memory

  • Our brain weighs about three pounds, but over two pounds of that is water. The brain is soft and gelatinous - its consistency is something between jelly and cooked pasta
  • Human brain has three parts:
    1. Cerebrum - outer part; governs thought, the senses and movement
    2. Cerebellum - middle; controls balance and muscle coordination
    3. Cerebral cortex - inner; governs involuntary muscles
  • Cerebral cortex is the smallest part of the human brain, but it is the largest portion of the nervous system
  • Human brain cell can hold five times as much information as the Encyclopedia Britannica
  • Human brain is more complex than the most powerful computer and the average number of nerve cells (neurons) in the brain is 100 billion
  • Though it makes up only two percent of our total body weight, human brain demands 20 percent of the body's oxygen and calories
  • The time until unconsciousness after loss of blood supply to the brain is about eight to ten seconds. (So don't let anybody squeeze your neck.)
  • Nerve impulses to and from the brain travel as fast as 170 miles per hour, when we touch something, we send a message to our brain at 124 mph
  • Our hearing is so sensitive it can distinguish between hundreds of thousands of different sounds
  • If you go blind in one eye, you will only lose about one-fifth of your vision, but all your depth perception
  • Human eyes can distinguish up to one million color surfaces and take in more information than the largest telescope known to man
  • Each of our eyes has 120 million rods, which help us see in black and white. Each human eye has six million cones, which help us see in color

Human Anatomy Facts: Lungs, Heart and Blood

  • We breathe in about 7 quarts of air every minute? Our lungs inhale over two million liters of air every day and if they were spread out, they are large enough to cover a tennis court. Good thing air is free!
  • Over our lifetime, the average person will breathe in around 40 pounds of dust
  • A cough releases an explosive charge of air that moves at speeds up to 60 mph
  • A sneeze can exceed the speed of 100 mph (160.93 km/h). It's totally impossible to sneeze with our eyes open
  • Human body contains about sixty thousand miles of blood vessels. Blood is a liquid organ
  • Did you know that we have super-highways running through our body? Our blood cells travel them all day, every day. They are called capillaries. We have around 10 billion of these capillaries mapped throughout the body. And these capillary 'highways' probably don't have any 'speed limits', as it only takes 60 seconds for blood to circulate the entire body. They are also extremely small. The largest capillary is only about as wide as the head of a pin - so in many cases the blood cells pretty much have to pass through them single file. Despite being microscopic, capillaries have an enormous task: To connect arteries to tissues and to veins and facilitate the transport of blood (with its oxygen and nutrients) to all parts of the body. Capillaries carry about 1/6th of the body's total blood at any given time
  • Human heart creates enough pressure when it pumps blood, that it could squirt blood 30 feet
  • We give birth to 100 billion red cells every day. The average red blood cell lives for 120 days. An individual blood cell takes about 60 seconds to make a complete circuit of the entire body
  • There are 2.5 trillion red blood cells in our body, which means about two and a half million new ones need to be produced every second by our bone marrow. That's the same as reproducing the population of the city of Toronto every second. That's 100 billion every day
  • If you look at all the cells and tissues in our body, about 25 million are reproduced every second, which is like reproducing almost the entire population of Canada every second! Platelets are manufactured at the rate of 200 billion a day
  • Every day, the average heart beats 100,000 times and pumps about 2,000 gallons of blood. Our blood is on a 60,000 mile journey, 168,000,000 miles in a lifetime
  • By the time we turn 70, our heart will have beat some two-and-a-half billion times (computing on an average of 70 beats per minute). Therefore, an average person has three billion heartbeats to spare. That is why some doctors believe that drugs (called beta-blockers) that slow down the heart rate may help prolong life. Generally, unhealthy people have faster heart rates while athletic individuals have slower heart rates
  • Kidneys clean our blood. Each minute, about a quart of blood passes through your kidneys and comes out clean. In a lifetime, your kidneys will wash more than 1 million gallons of blood

Medical Health Trivia: Skin and Human Body

  • Human body consists of nine main systems:
    1. Skeletal System
    2. Muscular System
    3. Nervous System
    4. Hormonal System
    5. Circulatory System
    6. Digestive System
    7. Respiratory System
    8. Immune System
    9. Reproductive System
  • Bones might be classified as part of the circulatory system since they produce all of the body's blood cells within their marrow
  • Our big toes have two bones each while the rest have three bones. There are 206 bones in the human body
  • Normal body temperature is 98.6° Fahrenheit (37° Celsius)
  • The five senses guide human beings in performing many different operations are sight, hearing, smell, touch and taste
  • The four taste zones on our tongue are bitter (back), sour (back sides), salty (front sides) and sweet (front)
  • There are 9,000 taste buds on the tongue. We lose a lot of these taste buds as we get older
  • A pair of human feet contains 250,000 sweat glands. Each foot can sweat the equivalent of half a glass of water per day
  • There are about one trillion bacteria on each of our feet. That's why feet are so smelly
  • Our teeth start growing six months before we are born
  • What's the hardest substance in our body? It's the enamel on our teeth
  • The strongest muscle of the human body is the masseter muscle, which is located in the jaw
  • Relative to its size, the strongest muscle in the human body is the Tongue
  • We have over 600 muscles. We use 200 muscles to take one step. If we blink one eye we move over 200 muscles. According to doctors we use only four muscles to smile, but when we frown we use sixty four muscles - 16 times more.
  • Our heels bear 60 percent of our body's weight
  • What are the 10 human body parts that are only three letters long? Answers: Eye, Ear, Leg, Arm, Jaw, Gum, Toe, Lip, Hip and Rib
  • Our bodies are about 70 percent water. We make one liter of saliva every day
  • We have copper, zinc, cobalt, calcium, manganese, phosphates, nickel and silicon in our bodies
  • The main purpose of eyebrows is to keep sweat out of the eyes
  • There are more living organisms in one average human body than there are humans in the whole world!
  • We have 26 feet of intestine; the small intestine is 21 feet long and the large intestine is 5 feet
  • What job does your appendix do? Nothing. It is a little dead-end tube or sac that dangles about three inches from the lowest part of your large intestine. Food particles sometimes get caught in the tube and bacteria grows, irritating the appendix. It swells up and needs to be removed
  • The liver performs over 500 different functions. When a portion of a normal liver is removed, the remaining liver can grow back (regenerate) to the original size within one to two weeks
  • Skin is the body's largest organ. The liver is the second largest
  • In one square inch of our hand we have nine feet of blood vessels, 600 pain sensors, 9000 nerve endings, 625 sweat glands, 36 heat sensors and 75 pressure sensors
  • Our stomach makes a new layer of mucus every 2 weeks. Otherwise, it will digest itself. Every month we grow a brand new outer layer of skin
  • Every 12 years, we humans have an entirely new skeleton due to the body's continual replacement of its bone cells
  • Our nose is our personal air-conditioning system; it warms cold air, cools hot air and filters impurities
  • The left testicle hangs lower than the right in 85 percent of men

Medical General Knowledge Trivia

  • pneumonoultramicroscopicsilicovolcanokoniosis (45 letters), a lung disease caused by breathing in certain particles, is the longest word in the English language dictionary
  • The hearing range for a young adult human is 20 to 20,000 Hz. For an elderly person, hearing is less at 50 to 8,000 Hz. In contrast, a cat can hear better at 100 to 60,000 Hz and a dolphin has the widest hearing range at 200 to 150,000 Hz
  • The auditory pain threshold is 130 Db. The threshold for hearing damage is 90 Db for an extended period of time. A rocket launching pad is equivalent to 180 Db, a jet plane to 140 Db, an automobile horn to 120 Db, a nagging wife up to 75 Db and a soft whisper, 30 Db. Interestingly, the sound of a snore (up to 69 decibels) can be almost as loud as the noise of a drill
  • Did you know that pain has a purpose? Pain is a protective mechanism for the body. It occurs whenever tissues are being damaged, and it causes the individual to react to whatever is causing the pain.
  • According to a German study, the risk of a heart attack is higher on Monday than any other day of the week. Probably because Mondays are stressful days
  • Most deaths in a hospital happen between 4 pm and 6 pm. This is said to be the time when the human body is at its weakest
  • Hepatitis C is 4000 times more infectious than HIV. There are over 200 different cold viruses
  • The mosquito is the most dangerous animal in the world. 3000 people die each day from Malaria. World wide, 515 million people are infected
  • There are more than a hundred different types of arthritis. We have a one in five chance of experiencing some form of rheumatic disease, such as arthritis, during our lifetime
  • 75 percent of adults do not know that antibiotics kill bacteria but not viruses
  • Tobacco smoke contains over 4,000 chemicals, including at least 50 that cause, initiate or promote cancer in humans, such as tar, ammonia, carbon monoxide, oxides of nitrogen and benzopyrene
  • Tobacco kills more people each year than all of the illegal drugs in the last century

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