تبلیغات
علم - عضله های انسان
دوشنبه 11 آبان 1388

عضله های انسان

   نوشته شده توسط: علی همایونی    

انواع عضلات

سه نوع عضله عبارتند از عضله اسكلتی كه اسكلت را می پوشاند و به حركت درمی آورد؛ عضله قلبی كه دیواره های قلب را تشكیل می دهد و عضله صاف كه در دیواره لوله گوارش، رگ های خونی و مجاری تناسلی و ادراری وجود دارد. هر نوع عضله كاركرد متفاوتی دارد و رشته های آن دارای شكل خاصی هستند. عضله اسكلتی كه اندام ها و بدن را حركت می دهد، از رشته های دراز، قوی و موازی تشكیل شده است. این نوع عضله، قادر به انقباض سریع و قوی است ولی تنها به مدت كمی می تواند با حداكثر قدرت كار كند. عضله قلبی خون را به سراسر بدن می راند. این عضله رشته هایی كوتاه، شاخه دار و متصل به هم دارد كه شبكه ای را در داخل دیواره های قلب تشكیل می دهند. این نوع عضله می تواند بدون خستگی، مدام كار كند. عضله صاف، كاركردهایی چون حركت دادن غذا در لوله گوارش را بر عهده دارد. این عضله از رشته هایی كوتاه و دوكی شكل تشكیل شده است كه به هم متصل شده، صفحاتی را تشكیل می دهند و می توانند به مدت های طولانی كار كنند

عضلات چگونه كار می كنند؟

حركت زمانی ایجاد می شود كه پیام های ارسالی از دستگاه عصبی باعث انقباض عضله شوند حركت آگاهانه بدن به وسیله عمل متقابل عضلات اسكلتی، استخوان ها و مفاصل صورت می پذیرد. بیشتر عضلات یك استخوان را به استخوان دیگر مرتبط می كنندو از یك مفص عبور می كنند. وقتی یك عضله منقبض می شود، استخوان ها را می كشد و به حركت درمی آورد. بیاری از عضلات، به صورت جفتی هستند، به طوری كه در هر سمت یك مفصل یك عضله قرار می گیرد و حركات مخالف را ایجاد می كند. برای مثال، در بازو، عضله سه سر با انقباض خود بازو را صاف می كند و عضله دو سر با انقباض خود باعث تا شدن بازو می شود


situs bandar togel online, agen togel online, agen judi togel online terpercaya, bonus deposit togel online
یکشنبه 30 دی 1397 09:31 ب.ظ
Wow, this piece of writing is pleasant, my sister is analyzing these things, therefore I am going to convey her.
Passenger ships Bari Patras
جمعه 14 دی 1397 10:20 ب.ظ
This design is incredible! You certainly know how to keep a reader amused.
Betaeen your wiit and yoour videos, I was almoset moved to start my
ownn blog (well, almost...HaHa!) Fantastic job. I really enjoyed what you had to say, and more than that, how you presented it.

Too cool!
agen maxbet
پنجشنبه 6 دی 1397 11:16 ق.ظ
That is really attention-grabbing, You're an excessively skilled blogger.
I have joined your rss feed and stay up for in the hunt for
extra of your fantastic post. Additionally, I have shared your web site in my social networks
agen slot mesin
یکشنبه 25 آذر 1397 04:20 ب.ظ
Hi, i feel that i noticed you visited my website thus
i got here to go back the favor?.I'm trying to in finding issues to enhance
my web site!I guess its good enough to make use of a few of your ideas!!
rules of survival hack march 6 2018
سه شنبه 13 آذر 1397 03:26 ق.ظ
I was curious if you ever thought of changing the layout of your blog?
Its very well written; I love what youve got to say.
But maybe you could a little more in the way of content so people
could connect with it better. Youve got an awful lot of text for only having one or 2 images.

Maybe you could space it out better?
agen sbobet
دوشنبه 5 آذر 1397 04:52 ب.ظ
Wonderful blog! I found it while browsing on Yahoo News.
Do you have any tips on how to get listed in Yahoo
News? I've been trying for a while but I never seem to get
there! Thank you
agen sv388
شنبه 3 آذر 1397 05:17 ق.ظ
Yesterday, while I was at work, my sister stole my iPad and tested to see if it can survive a thirty
foot drop, just so she can be a youtube sensation. My iPad is now broken and she has 83 views.

I know this is totally off topic but I had to share it
with someone!
https://www.koverroos.com/Patiofurniturecovers/outdoorTableCovers/CafeSetCover
شنبه 28 مهر 1397 06:43 ق.ظ
Hi there! I could have sworn I've visited your blog before but after going through many of the articles I
realized it's new to me. Anyways, I'm certainly happy I stumbled upon it and I'll be book-marking it and checking back frequently!
www.koverroos.com
جمعه 27 مهر 1397 02:39 ق.ظ
Its like you read my mind! You seem to know a lot about this, like you wrote the book in it or something.
I think that you could do with a few pics to drive the message home a little bit, but
other than that, this is excellent blog. A great read.
I will definitely be back.
new-giveaways.win
جمعه 20 مهر 1397 06:46 ب.ظ
He was 35 and his intro declared that he was currently driving around
the M25 together a free afternoon. Like all dating sites,
they may be suitable for people who find themselves single and so are seeking short
or long-term relationships. When it comes to traditional dating circuits like
discos, pubs and beaches, they act pretty much like a melting pot of cultures.
kitty
پنجشنبه 5 مهر 1397 04:09 ق.ظ
I ⅼіke what you guys are usually up too. Thiis type oof clever work and reporting!
Keep up the good works guys I've incorpⲟratyed you
guys to my ownn blogroll.
https://www.koverroos.com/
سه شنبه 3 مهر 1397 10:55 ب.ظ
Hey there! I just want to give you a big thumbs up for the great information you've got
right here on this post. I'll be coming back to your site for more soon.
Organic Food
پنجشنبه 8 شهریور 1397 01:15 ق.ظ
Thanks in favor of sharing such a fastidious thought, post is good, thats why i have read
it fully
molecular-penis-enlargeme38159.total-blog.com
چهارشنبه 3 مرداد 1397 09:54 ق.ظ
My brother recommended I might like this website. He was totally right.
This post truly made my day. You can not imagine simply how much time I had spent for
this information! Thanks!
Minoan lines
دوشنبه 25 تیر 1397 11:41 ب.ظ
Touche. Sound arguments. Keeep up the amaazing spirit.
https://herospeak.eu/viewtopic.Php?id=20477
دوشنبه 25 تیر 1397 08:09 ب.ظ
Hi I am so delighted I found your web site, I really found you by mistake, while I was searching on Aol for something else,
Anyhow I am here now and would just like to say cheers for a remarkable post and a
all round entertaining blog (I also love the theme/design), I don?t have
time to read through it all at the moment but I have saved it
and also added in your RSS feeds, so when I have time I will be back to read a great deal
more, Please do keep up the excellent work.
jacket hoodie mens
سه شنبه 19 تیر 1397 12:55 ق.ظ
Hello, this weekend is nice designed for me, for the reason that this time i am reading this wonderful educational article here at my house.
online chat
یکشنبه 17 تیر 1397 07:14 ب.ظ
Aw, this was an exceptionally nice post. Spending some
time and actual effort to create a top notch
article… but what can I say… I procrastinate a whole lot and never seem to
get anything done.
online HTML editor
شنبه 9 تیر 1397 09:09 ق.ظ
Great site you have here but I was curious about if you knew of any message boards that cover
the same topics discussed here? I'd really like
to be a part of community where I can get comments from other knowledgeable people that share the same interest.
If you have any recommendations, please let me know.
Thanks!
Makelar Judi Online Bola Aman
جمعه 18 خرداد 1397 01:36 ق.ظ
What's up mates, its enormous piece of writing about cultureand completely
explained, keep it up all the time.
online chat rooms
دوشنبه 31 اردیبهشت 1397 03:07 ق.ظ
Hi! Quick question that's entirely off topic. Do you know how
to make your site mobile friendly? My blog looks weird when browsing from
my apple iphone. I'm trying to find a theme or
plugin that might be able to resolve this problem. If you have any suggestions, please share.
Cheers!
HTML editor
یکشنبه 30 اردیبهشت 1397 09:15 ب.ظ
Have you ever considered about adding a little bit more than just
your articles? I mean, what you say is valuable and everything.

But think of if you added some great visuals or video clips to give your posts more, "pop"!
Your content is excellent but with images and video clips, this
blog could definitely be one of the best in its field.
Wonderful blog!
dating chat
جمعه 21 اردیبهشت 1397 02:38 ق.ظ
This is a topic that is near to my heart...

Best wishes! Exactly where are your contact details though?
http://www.ozelkurdele.com/es/productos/cinta-de-raso
دوشنبه 17 اردیبهشت 1397 01:57 ق.ظ
hello there and thank you for your info – I've certainly picked up anything new from right here.
I did however expertise some technical points using this
site, since I experienced to reload the website lots of times previous to I could
get it to load properly. I had been wondering if your hosting is OK?
Not that I am complaining, but sluggish loading instances times will sometimes affect your placement in google and can damage your high quality score if ads
and marketing with Adwords. Well I am adding this RSS to my email and
could look out for much more of your respective exciting content.
Ensure that you update this again very soon.
Apparel Shop
پنجشنبه 13 اردیبهشت 1397 01:34 ق.ظ
Heya i'm for the first time here. I came across this board and I find It really useful & it helped me out much.
I hope to give something back and help others like you helped me.
online HTML editor
سه شنبه 11 اردیبهشت 1397 03:12 ب.ظ
I do accept as true with all the ideas you have offered in your post.
They're very convincing and will definitely
work. Still, the posts are very short for beginners.

May you please extend them a bit from subsequent time? Thanks for the
post.
Big Farm Mobile Harvest mod apk
چهارشنبه 8 فروردین 1397 06:33 ب.ظ
Title: Goodgame Big Farm Trick Success - Aid.
buy my house now
دوشنبه 21 اسفند 1396 07:39 ق.ظ
I don't know whether it's just me or if everybody else experiencing issues
with your website. It appears like some of the written text on your
posts are running off the screen. Can somebody else please comment and let me know
if this is happening to them too? This might be a issue with my internet browser because I've had this happen previously.

Thank you
kostnad for resor 2017
شنبه 5 اسفند 1396 10:22 ب.ظ
І tendd not to drop a leave a response, however I read a few of the remarks on this pafe علم - عضله
های انسان. I doo have 2 ԛuwstions for you if it's okay.
Could itt be only mee or do a few of the гemarks ɑppаr like they
arе left bby brain dead individuals? :-P And, if you are posting
att aⅾditional sites, I'd like to keep up with you.

Could you list of every one оf your social networking ѕіtes
likе your twitter feed, Facebook page or linkedin ρrofile?
web cam girl
شنبه 14 بهمن 1396 12:55 ق.ظ
I think this is one of the most significant information for me.
And i'm glad reading your article. But want to remark on some general things, The site style is ideal, the
articles is really great : D. Good job, cheers
 
لبخندناراحتچشمک
نیشخندبغلسوال
قلبخجالتزبان
ماچتعجبعصبانی
عینکشیطانگریه
خندهقهقههخداحافظ
سبزقهرهورا
دستگلتفکر
نمایش نظرات 1 تا 30