Useless Facts > Human Body June 4, 2006
Posted by tkcollier in cool stuff, Life, Lifestyle.trackback
Thanks to Caroline Collier
The average human brain has about 100 billion nerve cells.>> There are 45 miles (72 km) of nerves in the skin of a human being.
The average human heart will beat 3,000 million times in its lifetime and pump 48 million gallons of blood.
Each square inch (2.5 cm) of human skin consists of 20 feet (6 m) of blood vessels.
During a 24-hour period, the average human will breathe 23,040 times.
Human blood travels 60,000 miles (96,540 km) per day on its journey through the body.
>> Nerve impulses to and from the brain travel as fast as 170 miles (274 km) per hour.
>> The thyroid cartilage is more commonly known as the adams apple.
>> It’s impossible to sneeze with your eyes open.
>> Your stomach needs to produce a new layer of mucus every two weeks or it would digest itself.
>> It takes the interaction of 72 different muscles to produce human speech.
>> The average life of a taste bud is 10 days.
>> The average cough comes out of your mouth at 60 miles (96.5 km) per hour.
>> Relative to size, the strongest muscle in the body is the tongue.
>> When you sneeze, all your bodily functions stop even your heart.
>> Babies are born without knee caps. They don’t appear until the child reaches 2-6 years of age.
>> Right handed people live, on average, nine years longer than left handed people do.
>> Children grow faster in the springtime.
>> It takes the stomach an hour to break down cow milk.
>> Women blink nearly twice as much as men.
>> Blondes have more hair than dark-haired people do.
>> There are 10 human body parts that are only 3 letters long (eye hip arm leg ear toe jaw rib lip gum).
>> If you go blind in one eye you only lose about one fifth of your vision but all your sense of depth.
>> The average human head weighs about 8 pounds.
>> Our eyes are always the same size from birth, but our nose and ears never stop growing.
>> In the average lifetime, a person will walk the equivalent of 5 times around the equator.
>> An average human scalp has 100,000 hairs.
>> The length of the finger dictates how fast the fingernail grows. Therefore, the nail on your middle finger grows the fastest, and on average, your toenails grow twice as slow as your fingernails.
>> The average human blinks their eyes 6,205,000 times each year.
>> The entire length of all the eyelashes shed by a human in their life is over 98 feet (30 m).
>> Your skull is made up of 29 different bones.
>> Odontophobia is the fear of teeth.
>> Ancient Egyptians shaved off their eyebrows to mourn the deaths of their cats.
>> Your ears and nose continue to grow throughout your entire life.
>> After you die, your body starts to dry out creating the illusion that your hair and nails are still growing after death.
>> Hair is made from the same substance as fingernails.
>> The average surface of the human intestine is 656 square feet (200 m).
>> A healthy adult can draw in about 200 to 300 cubic inches (3.3 to 4.9 liters) of air at a single breath, but at rest only about 5% of this volume is used.
>> The surface of the human skin is 6.5 square feet (2m).
>> 15 million blood cells are destroyed in the human body every second.
>> The pancreas produces Insulin.
>> The most sensitive cluster of nerves is at the base of the spine.
>> The human body is comprised of 80% water.
>> The average human will shed 40 pounds of skin in a lifetime.
>> Every year about 98% of the atoms in your body are replaced.
>> The human heart creates enough pressure to squirt blood 30 feet (9 m).
>> You were born with 300 bones. When you get to be an adult, you have 206.
>> Human thighbones are stronger than concrete.
>> Every human spent about half an hour as a single cell.
The intro here will give you a glimpse of the incredible dissected detail of actual human bodies in this controversial exhibit, currently touring the US. Chris Yates just saw the Atlanta exhibit and his rave encouraged this post. There is a video on their web-site.
20 amazing facts about the human body | Science | The Observer.
can ur intestines go around the world 2 times if fully stretched out?
Re: Bodies, The Exhition.
This is a fascinating look at the human body but the website neglects to tell the public who these people are and where these bodies actually came from. this was very controversial when it first came out since the bodies were allegedly prisoners killed just for this exhibition. It is very barbaric and I wish they had used the bodies of those who donated their bodies to science… or for exhibitions.
I actually went to this exhibit too when it reached Detroit and I inquired into where the bodies came from too and we were informed and (showed papers) about these prisoners. They were all sentenced to the death sentence anyways for petty crimes such as theifory and others (also treason and murder) and all the bodies came from China ( just like everything else in america). what i also found out though, is that the brain of the child with “water on the brain” actually did from it so the children bodies and parts were natural deaths…not execution such as the adults. the only part i didn’t like was the “fetus” exhibit, cuz some of those were still borns and some were supposed abortions..that was gross. i don’t know what parent would give up their child (even though dead) to science instead of a proper burial..and i never want to meet them.
How do you know that your ears and nose never stop growing? and why don’t they?
soandso, did you ever see Pinnochio? 😀 – Tim
P.S. “Stiff: The Curious Lives of Human Cadavers,” by Mary Roach, is a pretty facinating look at some similar topics. To Sam’s point, she discusses these types of moral and ethical questions, along with graverobbing, and other… less-than-pleasant things that humans have done in the name of research and science.
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wow thats interesting and no, your intestines cannot stretch around the equator. But I think that all of your veins can stretch from main to california or something along that line
your veins can stretch around the world 2 and a half times if i am not mistaken
I’m looking for an elementary view of the intestinal tract. Exactly where is it located in relation to the stomach?
I have MS and am plagued with constipation and have discomfort in upper abdomen while trying to evacuate.
Quadriceps femoris…there is no one single answer to this question since here are different ways to measure force…
…there is absolute strength(maximum force),dynamic force(repeated motions), supple strength(exert force quickly)& strength endurance(withstand fatigue)…
…there are also three different types of muscles in the human body…cardiac, smooth & skeletal…
…good answers to this far from certain question include the following:
…the gluteus maximus muscle is the largest muscle of the body, it maintains the body in an adjectives position & as an anti-gravitational muscle helps us walk & climb up or down stairs…
…the heart is the only cardiac muscle and is the hardest working muscle within the body, pumping over 2,500 gallons of blood daily and has the ability of trouncing over 3 billion times over a lifetime…
…the strongest muscle based on weight is the masseter(chewing muscle)…it can close the mouth with over 200 lbs of pressure on the molars…
…the soleus muscle is the strongest pulling muscle within the body…it is located below the calf muscle in the leg & is involved in walking, running and jumping…it also is the muscle that pulls to hold us from falling backward…
…other strong muscles are the tongue, the eye muscles which can make 10,000 coordinated movements in an hour and as expected the uterus which contracts to force a baby thru the birth canal…the pituitary gland produces the hormone oxitocin in which allows the uterus to exert tremendous strength..
http://tkcollier.wordpress.com/2006/06/04/useless-facts-human-body/#comment-50541
That is just a myth. Though it may feel like it does, your heart doesn’t stop when you sneeze. Actually, a powerful positive pressure condition is created in the chest. That can change the rhythm of the heart rate, but it will not stop it. A full answer can be found at: http://www.madsci.org/posts/archives/mar98/890925984.An.r.html
Read more: Did you know when you sneeze, all bodily functions stop … even your heart? | Answerbag http://www.answerbag.com/q_view/396705#ixzz0vcEIxYO0
The distance between the lens and the retina (eyeball diameter), ideally the “focal length,” is crucial for a lifetime reception of clear images. Baby eyeballs are too small to focus well, but the reception of blurred images has been shown to result in eyeball growth to compensate. Apparently, children who’s eyes are in the growth phase who read a lot may develop nearsightedness, since their eyeballs will continue growing beyond their normal stopping point. Children who seldom read but more often play outside will develop better distance vision. Somehow, the reception of fuzzy images stimulates the eyeball to grow, and the reception of clear images stops the growth. This has been demonstrated by experiments on rhesus monkeys, as described in the linked article above.
bones are constructed in exactly the same way that reinforced concrete is constructed. The steel of reinforced concrete provides the tensile strength, while the cement, sand, and rock provide the compressional strength. However, the compressional strength of bone is greater than that of even the best reinforced concrete, and the tensile strength approaches that of reinforced concrete.
http://www.nsbri.org/HumanPhysSpace/focus6/ep_development.html
29 bones in the skull?
i only count 28, will someone please tell me what i’m missing;
Cranial Bones;
Frontal
2 Temporal
2 Parietal
Occipital
Shpenoid
Ethmoid
Total so far (8)
Facial Bones;
Mandible
2 Maxilla
2 Palatine
2 Zygomatic
2 Nasal
2 Lacrimal
Vomer
2 Inferior nasal conchea
Total so far (22)
Middle ears;
2 Malleus
2 Incus
2 Stapes
Total 28
Unless the hyoid is being counted?
the hyoid is a bone, so yes, it is counted as such.