Bones - The largest bones is
the femur, or thigh bone, which is 20 inches in a six-foot tall man.
The smallest bone is the stirrup in the ear, which is one-tenth of an
inch. Each hand has 27 bones: eight in the wrist, five in the palm, and
14 in the fingers. A newborn baby has 300 bones, some of which fuse to
form the final 206 in the adult.
Blood - In a child, there are 60,000 miles of blood vessels. An adult has 100,000 miles of blood vessels. The blood circulates through the body 1,000 times a day.
Brain - A newborn baby has a brain that weights three ounces. The average brain of an adult weighs three pounds. The brains is the "mission control center" of the body, sending our messages at a rate of 240 miles per hour. The left side of the brain controls the right side of the body and the right side of the brain controls the left side of the body.
Cells - The cells are the body's building blocks. There are about 26 billion cells in an adult.
Eyes - Each eye weighs 1 1/4 ounces. The eyes are constantly in motion, even during sleep. Dreaming sleep especially is characterized by constant eye movement known as Rapid Eye Movement or "REM". Tears are normally secreted through two canals near the inner corner of the eyes.
Fluid - The body about 50% water. Blood is 83% water, muscles are 75% water, the brain 74% water, and the bones contain 22% water. In a single day, three pints of saliva are produced in the mouth.
Hair - Children have about 75,000 hairs on their heads, which grow about 1/100 of an inch daily. Hairs of different colors grow at different rates. Dark hair grows faster than light-colored hair. No one known why. Each hair on the scalp grows about five inches a year. A person loses about 50-70 head hairs per day. Eyelashes keep dust out of the eyes. An eyelash lives about 150 days before it falls out and is replaced.
Muscles - There are over 650 muscles in the body. The strongest muscle is the heart. It takes at least 14 muscles to smile. The largest muscle is the "gluteus maximus" or buttock. The smallest is located in the middle ear. Fingers have no muscles.
Nails - Nails are made up of a protein called keratin which also makes up the hair. Nails protect the ends of the fingers and toes. The half-moon at the root of the nail is called the lunule. Nails grow faster in summer than in winter. Fingernails grow fourtimes faster than toenails. Right - handed people's nails grow faster in their right hands. Left-handed people's nails grow faster on their left hand. The hair and nails of men grow faster than those of women.
Nose - More than 2,500 gallons of air flow through the average adult's nose in a day. The nose can recognize up to 1,000 different components of smells. (The nose doesn't smell an orange and recognize it as "oo! Orange!" What happens is your brain detects certain levels of smell "components" and then pieces it together like a puzzle to get "Ooo! Orange!") The nose is the air conditioning unit of the body. It cools or warms incoming air. It also filters the dirt and dust in the air.
Skin - The human body has six pounds of skin which is, on average, 1/20 of an inch thick. The two layers of skin are the epidermis and under it, the dermis. The skin is waterproof, it protects the body and helps to regulate body temperature. A substance called melanin colors the skin the more melanin, the darker the skin. A freckle is a dense concentration of melanin. A new layer of skin replaces the old layer approximately every 27 days, totalling about 1,000 new outer layers of skin a lifetime.
Teeth - Humans have 20 primary Baby teeth and 32 permanent teeth. By age 13 most people have 28 teeth. By age 18 the four "wisdom" teeth have grown in for a total of 32 permanent teeth.
Source:Anonymous
can you show us the picture?
How much sperm does a man make in life and on average how many eggs a woman has?
And what are the differnces?
"There are 50,000 new gay jeans created a day." LOL, wtf??? also, fingers have no muscles? are you retarded?
um i think your retarded obviously fingers are just ligaments so suck on that smarty
This article has a few inaccuracies but is on the whole pretty good. Your fingers really don't have any muscles. I got into an argument about this with a teacher once. The fingers are controlled by long tendons extending from your arm muscles. When you play the piano or type, you can feel those tendons moving around in the back of your hand. You can also move them back and forth across your knuckles if you're not squeamish. That's why fingers are so strong, despite being just bone and (in some people) fat.
No, Tears are not secreted through two canals near the inner corner of the eyes. These canals help remove the tear by draining fluid through the nose. That is why your nose runs when you cry. The glands that secrete the fluid are in upper eyelids and they discharge all the time. When you cry, the flow increases and the canals can't cope with it, so tears run out. This is another reason why you must not take every word on the internet granted. Always double check.
Can I wank all my body fluids into my own face?
does body hair thin out and shed like head hair when you age?
this site stinks
there needs to bp pictures and MORE info
*be
My grand-daughter wants to know how long it takes for an eyelash to grow please.
how many times do i shit
How long does it take for you nails to grow each day? Also how long do they grow each day?
not enough info stupid
uncool i did get the answer my queastion was how long do eyes grow?
actually, fingers do not have any muscle tissue at all. I don't exactly understand some of these comments except that they may have been written by 8 year olds predominantly. lol
I think that your site is awesome because it has a lot of information about the human body.I think that you should write more information about the human body.Keep going;you rock!
this site sucks im am doing a report i cant find shit on here !!!!!!!!!! it sucks
this site sucks
wow whoever made this site is cool but the site sucks i mean really lol
I once read a interesting article about human ears. it stated that human ears dont stop growing untill u die.There was also a calculation on measuring the length of the ear lobe and multiplying it by a certain number, you could show the age of any person,,,no body believes me and i didnt keep the article, please help me.jenie
you people that post these coments are mean!!! P.S. were is the ulna located
guest, you are the ruddest idoit in the world.
yah you guys are mean! can you post pictures?
wow this site is liike so awsum i love health science which this falls under and i tiink that this is a very gud site and yaull losers r very wel loserish if yaull want pics r wateva and to bad if u dont lik me cuz i frum da bahamas and we enn afraid of noone
this site does not suck and tobad if u cant find ntn das jus cuz u is a idiot
this site should be banned, it will be reported. i just had 8yo daughter read this crap.
Yea really take this crap and get on with ur life.
i think that these r
really good facts
but u would want
to add the human
heart on this page
cause im doing
a project on the
human heart and
i want alot of
facts so i could
get a good score
but i still like your
facts
hi these r reallly good
facts you have on this
page but u r still missing
some very good facts
like the human heart
and other stuff
I think this site is cool since I like science :)
i think so this site is fact but but very unprofessional if we all wants our kids to be good citizen this is not appropriate way of communicating with fresh growing children because that is the reason in america we looses our beloved children fast and when they realize reality either they get hidden disease or start ignoring parents.we all should remember that we all are american and we teach them best way that where ever they go they should be shine as abest american citizen .We all need to work togeather.We can change our beloved kids future togeather.
I have tasted sperm before and wondered why it tastes so salty. Has anyone else experienced this?
I want to try some more, if you could send me a mail, I would reply with my address and we get get our sperm party going
wow
i need more info on muscles or this is stupid i mean it has less then 10 facts wtf????
ps its for homework=) peace
what happens if you have a cavity.
do cavity's stay on your teeth for over a year
this place is kind of interesting.
needs pictruse and games
yo these are really good facts see i am doing a brocher so i need facts and these are really good.
hjgjf
P.S. hjgjf means that this is cool but needs pic and games an make it more fun who agres
i love this site
cool
explain properly and give some picts. of it so that people wil not complain about it but wish u also the best good luck keep it up
hell the hell is wrong with you people this is not for taking the MD boards
I think that this site is very infomately and ther was a great deal of time and effort it took to presenations . It's so sad that not all of us have the power of the brain to see that . But by the power of our Lord there go I . I will hope that they will have the strenght to relize this as Time gose along . Now go have a nice day if possible to do so.