Understanding:Movement by Muscles Video Lecture | Science for Grade 6

hey there I'm sure you know like squeaks
here does the exercise is a really
important part of keeping your body
healthy and strong and whether you're
running a race playing football or just
doing a whole bunch of jumping jacks
exercise means moving and one scishow
kids viewer named autumn wants to know
how does my body move really awesome
question autumn your body is made up of
lots of different parts that all have
very special jobs to help keep things
organized scientists sometimes group the
parts of our bodies into what we call
body systems and all of the parts in a
certain body system work together to
accomplish a goal when it comes to
making you move it takes three body
systems working together to get the job
done they're called the muscular system
the skeletal system and the nervous
system ready to check them out let's
start with the muscular system your
muscular system is made of well muscles
muscle is the stuff what scientists call
tissue that allows you to move around
muscles don't just help you to swing a
bat or jump to catch a ball some muscles
help you to wiggle your nose stick out
your tongue or even blink and some
muscles like the ones in your back and
legs just help to hold your body upright
so you can walk run or simply sit muscle
tissue is pretty flexible kind of like
thick rubber or elastic and also like
rubber it can stretch and change shape
let's see how when you bend your arm at
the elbow a muscle called your bicep
contracts or squeezes together when it
contracts it shaped gets shorter and
thicker when you straighten your arm
your bicep relaxes when a muscle relaxes
it shaped gets longer and thinner but
muscles contracting and relaxing aren't
enough to make us move they need to be
attached to another part of our body to
get the job done and that's where the
next system the skeletal system comes in
the main part of your skeletal system
the skeleton is made of all your hard
sturdy bones although we sometimes think
of skeletons as dead things especially
around Halloween that's actually not
true your bones are very much alive and
they have
any job one of the most important jobs
is to support or hold up the rest of
your body and this includes your muscles
strong chords called tendons attach your
muscles to your bones when the muscle
contracts or relaxes it pulls the bone
into a different position which makes it
move but how do your muscles know
they're supposed to move at all well
they know because they're under control
of your nervous system the most
important part of your nervous system is
your brain your brain is kind of like
your body's command center when you
decide to move your brain sends signals
to your muscles giving them specific
instructions on what to do say you're
trying to pick up a snack your brain
sends signals to the muscles in your
hand and wrist telling some of them to
contract as the muscles contract they
pull the bones in your fingers so that
you can grab the Apple then your brain
sends more signals to your arm muscles
telling them to move the bones in your
arms so that you can bring the Apple
right to your mouth snack accomplished
so it takes the actions of three body
systems to help us move the muscular
skeletal and nervous systems autumn
thanks for watching scishow kids and
asking such a great question and if
anyone else has a question for any of us
here at the fort let us know by leaving
a comment or emailing us at kids at the
scishow comm thanks guys see you later