muscular and bone system

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muscular and bone system:





It takes 17 muscles to smile and 43 to frown:
Unless you're trying to give your face a bit or workout, smiling is a much easier option for most of us . Anyone who's ever scowled , squinted or frowned for long period of time knows how it tires out the face  which doesn't do a thing to improve your mood.


Babies are born with 300 bones,
but by adulthood the number is reduced to 206.
The reason for this is that many of the bones of children composed of smaller component bones that are not yet fused like those ini the skull . This makes it easier for the baby to pass through the birth canal. The bones harden and fuse as the chhildren grow.


We are about 1 cm  taller in the morning than in the evening .
The cartliage between our bones gets compressed by standing, sitting and gets goes on making us just a little shorter at the end of the day than at the begining .


The strongest muscle in the human body is the tongue .

While you may not be abble to bench press much with you tongue , it is in fact the strongest muscle in your body in proportion to its size .If you think about it every time you eat swallow or talk you use your tongue, ensuring it gets quite a workout throughout the day


The hardest bone in the human body is the jawbone.
The next time someone suggests you take it on the chin , you might be well advised to take their advice as the jawbone is one of the most durable and hard to break bones in the body


You use 200 muscles to take one step

Depending on how you divide up muscle groups, just to take a single step you use somewhere in the neighborhood of 200 muscles . That's a lot of work for the muscles considering most of us take about 10000 steps a day.


The tooth is only part of the human body that can't repair itself

If you're ever chipped a tooth you know just how sadly true this one is . The outer layer of the tooth is enamel which is not a living tissue . Since it's not alive it can't repair itself, leaving your dentist to do the work instead.

It takes twice as long to lose new muscle if you stop working out than it DOD to gain it .
Lazy people out there shouldn't use this as motivation to not work out  , however . Its relatively easy to build new mucle tissue and get your muscles in shape so if anything this fact should be motivation to get off the couch and get moving..

Bone is stronger than some steel

This doesn't mean your bones can't break of course as they are much less dense than steel .Bone has been found to have a tensile strength of 20,000 psi while steel is much higher at 70,000 psi. Steel is much heavier than bone, however and pound for pound bone is the stronger martial .

The feet account for one quater of all the human body's bones

You may not give your feet much thought but they are home to more bones than any other part of your body. How many? Of the two hundered or so bones in the body , the feet contain a whopping 52 of them

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